7291993
Descrição
Quiz por Jeffrey Piggott, atualizado more than 1 year ago
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Criado por Jeffrey Piggott
quase 8 anos atrás
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Questão 1
Questão
A horizontal force of 120 N is used to pull a 25 kg bag of sand 10 m along a floor.
How much work is done by the force?
Responda
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A) 2.5 J
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B) 12.0 J
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C) 250 J
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D) 1200 J
Questão 2
Questão
A stopwatch is used to time an athlete running 100 m. The timekeeper forgets to reset the watch to zero before using it to time another athlete running 100 m.
How long does the second athlete take to run 100 m?
Responda
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A) 23.8 s
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B) 12.4 s
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C) 11.4 s
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D) 11.2 s
Questão 3
Questão
The diagram shows distance/time graphs.
Which graph shows an object moving at constant speed?
Responda
-
A)
-
B)
-
C)
-
D)
Questão 4
Questão
A large bag of feathers and a steel block balance each other on some scales.
What does this show about the masses and the weights of the bag of feathers and the steel
block?
Responda
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A) The masses are equal and the weights are equal.
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B) The masses are equal, but the weights are different.
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C) The masses are different and the weights are different
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D) The weights are equal, but the masses might be different.
Questão 5
Questão
A large bag of feathers and a steel block balance each other on some scales.
What does this show about the masses and the weights of the bag of feathers and the steel block?
Responda
-
A) The masses are equal and the weights are equal.
-
B) The masses are equal, but the weights are different.
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C) The masses are different and the weights are different.
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D) The weights are equal, but the masses might be different.
Questão 6
Questão
The following are distance/time graphs.
Which graph shows an object moving at constant speed?
Responda
-
A)
-
B)
-
C)
-
D)
Questão 7
Questão
A student pours liquid into a measuring cylinder.
The student records the volume of the liquid from the scale on the measuring cylinder. He then puts the measuring cylinder containing the liquid on a balance and records the mass.
What else needs to be measured before the density of the liquid can be calculated?
Responda
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A) the depth of the liquid in the measuring cylinder
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B) the mass of the empty measuring cylinder
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C) the temperature of the liquid in the measuring cylinder
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D) the volume of the empty measuring cylinder
Questão 8
Questão
Which statement about weight is correct?
Responda
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A) Weight and mass are both measured in the same unit.
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B) Weight is the amount of matter in a body and is measured in kilograms.
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C) Weight is a force and is measured in kilograms.
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D) Weight is a force and is measured in newtons.
Questão 9
Questão
A student wishes to measure accurately the volume of approximately 40 cm^3 of water. She has two measuring cylinders, a larger one that can hold 100 cm^3, and a smaller one that can hold 50c m^3. The water forms a meniscus where it touches the glass.
Which cylinder should the student use and which water level should she use to ensure an accurate result?
Responda
-
A)
-
B)
-
C)
-
D)
Questão 10
Questão
The graph shows how the speed of a car changes with time.
Which calculation gives the distance travelled by the car in 24 seconds?
Responda
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A) (14/24) m
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B) (24/14) m
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C) (24 x 14/2) m
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D) (24 x 14) m
Questão 11
Questão
Which instrument is used to compare the masses of objects?
Responda
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A) a balance
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B) a barometer
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C) a manometer
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D) a measuring cylinder
Questão 12
Questão
A liquid has a volume of 100 cm^3 and a mass of 85g.
The density of water is 1.0 g/cm^3.
How does the density of the liquid compare with the density of water?
Responda
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A) Its density is higher than that of water.
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B) Its density is lower than that of water.
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C) Its density is the same as that of water.
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D) It is impossible to say with only this data.
Questão 13
Questão
A student adds weights to an elastic cord. He measures the length of the cord for each weight.
He then plots a graph from the results, as shown in the diagram.
What has he plotted on the vertical axis?
Responda
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A) measured length
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B) original length
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C) (measured length + original length)
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D) (measured length – original length)
Questão 14
Questão
Four cars are driven along a road.
The table shows the work done by the engine in each car and the time taken by each car.
Which engine produces the most power?
Responda
-
A)
-
B)
-
C)
-
D)
Questão 15
Questão
Which situation is an example of a force acting over a large area to produce a small pressure?
Responda
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A) A builder hammering a nail into a piece of wood
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B) A cook using a sharp knife to cut vegetables
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C) A nurse pushing a needle into a patient’s arm
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D) A soldier marching in flat-soled boots
Questão 16
Questão
A student places four identical beakers on a bench.
Two beakers contain salt water of density 1.1 g / cm^3 and two beakers contain pure water of
density 1.0g /cm^3.
Which beaker exerts the greatest pressure on the bench?
Responda
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A)
-
B)
-
C)
-
D)
Questão 17
Questão
A student places his thumb firmly on the outlet of a bicycle pump, to stop the air coming out.
What happens to the pressure and what happens to the volume of the trapped air as the pump handle is pushed in?
Responda
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A) pressure decreases; volume decreases
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B) pressure decreases; volume remains the same
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C) pressure increases; volume decreases
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D) pressure increases; volume remains the same
Questão 18
Questão
In a race, a car travels 60 times around a 3.6 km track. This takes 2.4 hours.
What is the average speed of the car?
Responda
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A) 1.5 km / h
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B) 90 km / h
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C) 144 km / h
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D) 216 km / h
Questão 19
Questão
The object in the diagram is acted upon by the two forces shown.
What is the effect of these forces?
Responda
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A) The object moves to the left with constant speed.
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B) The object moves to the left with constant acceleration.
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C) The object moves to the right with constant speed.
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D) The object moves to the right with constant acceleration.
Questão 20
Questão
The diagram shows a balance being used to find the weight of a baby. The weight of the basket can be ignored.
At equilibrium, the pivot is nearer to the weight W than to the baby.
What is the weight of the baby?
Responda
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A) less than W
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B) more than W
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C) W
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D) impossible to tell
Questão 21
Questão
What is the principle of conservation of momentum?
Responda
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A) Force is equal to the rate of change of momentum.
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B) Momentum is the product of mass and velocity.
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C) The total momentum of a system remains constant provided no external force acts on it.
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D) The total momentum of two bodies after collision is equal to their total momentum before collision.
Questão 22
Questão
Water is pumped through a hose-pipe at a rate of 90 kg per minute. It emerges from the
hose-pipe horizontally with a speed of 20 m/s.
Which force is required from a person holding the hose-pipe to prevent it moving backwards?
Responda
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A) 30 N
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B) 270 N
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C) 1800 N
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D) 10 800 N
Questão 23
Questão
Two railway trucks of masses m and 3 m move towards each other in opposite directions with speeds 2 v and v respectively. These trucks collide and stick together.
What is the speed of the trucks after the collision?
Responda
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A) v/4
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B) v/2
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C) v
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D) 5v/4
Questão 24
Questão
A glider is descending at constant speed at an angle of 15 ° to the horizontal. The diagram shows the directions of the lift L , air resistance R and weight W acting on the glider.
Which vector triangle could represent the forces acting on the glider?
Responda
-
A)
-
B)
-
C)
-
D)
Questão 25
Questão
A student uses a measuring cylinder to measure the volume of some water. The diagram shows
part of the measuring cylinder. The top and bottom of the meniscus are labelled.
What is the volume of the water?
Responda
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A) 47.0 cm^3
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B) 47.5 cm^3
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C) 49.0 cm^3
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D 49.5 cm^3
Questão 26
Questão
The graph represents the motion of a train travelling between two stations.
Which statement about the train is correct?
Responda
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A) Its acceleration takes a longer time than its deceleration.
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B) It travels at constant speed for less than half of its journey time.
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C) It travels 2000 m in the first 100 s.
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D) It travels 10 000 m at constant speed.
Questão 27
Questão
A car travels 6.0 km along a main road in 6.0 minutes. It then travels 2.0 km along a minor road in 6.0 minutes.
Which calculation of average speed for the whole journey is correct?
Responda
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A) 8.0 ÷ 12.0 = 0.67 km / minute
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B) 12.0 ÷ 8.0 = 1.5 km / minute
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C) 8.0 + 12.0 = 20 km / minute
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D) 8.0 × 12.0 = 96 km / minute
Questão 28
Questão
Two metal blocks P and Q have identical dimensions. They hang on identical spring balances.
What can be deduced about P and Q?
Responda
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A) They have different volumes and different weights.
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B) They have different volumes, but equal masses.
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C) They have equal volumes and equal weights.
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D) They have equal volumes, but different masses.
Questão 29
Questão
The diagram shows the only three forces acting on an object.
What is the resultant force on the object?
Responda
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A) 0 N
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B) 5.0 N towards the left
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C) 5.0 N towards the right
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D) 10.0 N towards the right
Questão 30
Questão
A uniform rod rests on a pivot at its centre. The rod is not attached to the pivot. Forces are then applied to the rod in four different ways, as shown. The weight of the rod can be ignored.
Which diagram shows the rod in equilibrium?
Responda
-
A
-
B
-
C
-
D
Questão 31
Questão
A vehicle sinks into soft ground. The vehicle is changed so that it does not sink as far.
Which change is made?
Responda
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A) a lower centre of mass
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B) a more powerful engine
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C) wheels that are further apart
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D) wider tyres
Questão 32
Questão
The diagram shows the height of a stack of identical coins.
What is the thickness of one coin?
Responda
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A) 0.20 mm
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B) 2.0 mm
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C) 0.24 cm
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D 2.0 cm
Questão 33
Questão
In a laboratory, a ball is dropped in a vacuum and falls 200 cm.
Which statement describes the acceleration of the ball?
Responda
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A) It is greater at 10 cm than at 200 cm.
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B) It is greatest at 200 cm.
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C) It is smaller at 50 cm than at 100 cm.
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D) It is the same value at 50 cm as at 150 cm.
Questão 34
Questão
A man stands by a railway track.
A train travelling at 40 m / s takes 2.0 s to pass the man.
What is the length of the train?
Responda
-
A) 20 m
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B) 38 m
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C) 40 m
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D) 80 m
Questão 35
Questão
Which statement about the masses and weights of objects on the Earth is correct?
Responda
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A) A balance can only be used to compare weights, not masses.
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B) Heavy objects always have more mass than light ones.
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C) Large objects always have more mass than small ones.
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D) Mass is a force but weight is not.
Questão 36
Questão
The block of metal shown has a mass of 240 g.
What is the density of the metal?
Responda
-
A) 0.25 g / cm^3
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B) 4.0 g / cm^3
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C) 16 g / cm^3
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D) 14 400 g / cm^3
Questão 37
Questão
A car engine causes a forward force of 100 kN to act on the car. The total resistive force on the car is 20 kN.
What is the resultant force on the car?
Responda
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A) 5.0 kN
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B) 60 kN
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C) 80 kN
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D) 120 kN
Questão 38
Questão
The diagram shows four solid objects resting on a horizontal surface. The objects all have the same weight, and are drawn to the same scale.
Which object exerts the least pressure on the surface?
Responda
-
A
-
B
-
C
-
D
Questão 39
Questão
A measuring cylinder containing liquid is placed on a top-pan balance. The apparatus is left overnight and some of the liquid evaporates. The diagrams show the readings.
What is the density of the liquid?
Responda
-
A) 0.875 g / cm^3
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B) 1.14 g / cm^3
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C) 1.40 g / cm^3
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D) 1.42 g / cm^3
Questão 40
Questão
A child sits on a rubber ball and bounces up and down on the ground.
What stays the same when the ball hits the ground?
Responda
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A) the acceleration of the ball
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B) the mass of the ball
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C) the shape of the ball
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D) the velocity of the ball
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