Physics 2.1 Forces and their effects

Questão 1 de 30

1

What is acceleration?

Selecione uma das seguintes:

A measure of how quickly velocity is changing
How fast something is moving

Explicação

Questão 2 de 30

1

What is the resultant force?

Selecione uma das seguintes:

The single force that represents all the forces acting at a point and has the same effect on its motion as all the other individual forces.
A strong force that acts on an object

Explicação

Questão 3 de 30

1

If a non-zero resultant force acts on a stationary object?

Selecione uma ou mais das seguintes:

The object will accelerate in the direction of the resultant force
It will float
It will move

Explicação

Questão 4 de 30

1

If a resultant force acting on a stationary object is zero it will remain stationary?

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 5 de 30

1

If the resultant force acting on a moving object is zero?

Selecione uma das seguintes:

It will continue to move at the same velocity
It will slow down
It will stop moving

Explicação

Questão 6 de 30

1

If the resultant force acting on an object is non-zero, it will accelerate in the direction of the resultant force?

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 7 de 30

1

Preencha os espaços em branco para completar o texto.

When the resultant force acts on an object, the object can experience 5 forms of acceleration: , , and

Explicação

Questão 8 de 30

1

How do you calculate the acceleration produced by a resultant force?

Selecione uma das seguintes:

A=F/M or F=MXA
A=(V-U)/T
CHANGE IN VERTICAL/CHANGE IN HORIZONTAL

Explicação

Questão 9 de 30

1

Preencha os espaços em branco para completar o texto.

When two objects interact, they exert forces on each other that are and

Explicação

Questão 10 de 30

1

Preencha os espaços em branco para completar o texto.

On the surface of the planet, gravity makes everything towards the and gives everything a

Explicação

Questão 11 de 30

1

Preencha os espaços em branco para completar o texto.

To calculate the weight of an object using its mass and gravitational field strength:
W is
M is
G is

Explicação

Questão 12 de 30

1

For a vehicle to travel at a steady speed...

Selecione uma das seguintes:

The driving force (provided by the engine) balances the resistive/frictional forces acting on the vehicle
The driving force is greater than friction
Friction is grater than the driving force

Explicação

Questão 13 de 30

1

Preencha os espaços em branco para completar o texto.

The forces that oppose the motion of an object moving through a fluid with the objects .

Explicação

Questão 14 de 30

1

Preencha os espaços em branco para completar o texto.

Ways of increasing a vehicle's top speed include:

* : by altering the of a vehicle to make it more .

* Increasing the : meaning the becomes so the drag force on the vehicle will at a speed.

Explicação

Questão 15 de 30

1

What is terminal velocity?

Selecione uma das seguintes:

The velocity at which the resistive forces (drag) acting on the object match the force due to gravity (weight)
The fastest rate something travels
Where the gravity is greater than the resistive forces

Explicação

Questão 16 de 30

1

Preencha os espaços em branco para completar o texto.

When an object falls through a fluid it initially due to the force of being than the forces. As the object moves , the that act on it . This gradually the until the force is to the force so it wont anymore. It will have reached its () and will fall at a .

Explicação

Questão 17 de 30

1

The terminal velocity of falling objects depends on their ❌ and ❌. The accelerating force acting on all objects is ❌ and if it were not for ❌, everything would fall at the ❌ rate (like on the ❌). The terminal velocity of objects is determined by its ❌ in comparison to its ❌. The frictional force depends on its shape and area.

Arraste e solte para completar o texto.

shape

area

gravity

air resistance

same

moon

drag

weight

Explicação

Questão 18 de 30

1

A parachute helps to reduce a diver's terminal velocity because it ❌ the surface area which increases the ❌ acting on the diver. This causes the diver to ❌, which ❌ his speed and therefore the ❌.

Arraste e solte para completar o texto.

increases

air resistance

slow down

reduces

terminal velocity

Explicação

Questão 19 de 30

1

What is the stopping distance?

Selecione uma ou mais das seguintes:

The sum of how fast your going and how long it takes for the brakes to work
The sum of the thinking distance and stopping distance
The sum of the thinking distance and braking distance

Explicação

Questão 20 de 30

1

Selecione das listas do Menu para completar o texto.

Thinking distance is the distance the vehicle travels during the driver's ( reaction, Braking ) time

Braking distance is the ( distance, metres ) the vehicle travels after the ( brakes, seat belts, reactions ) are applied until it comes to a complete ( stop, slow down, deceleration )

Explicação

Questão 21 de 30

1

For a given braking force... what happens to the stopping distance?

Selecione uma das seguintes:

The faster a vehicle is moving, the greater the stopping distance and the braking force needed
The slower the vehicle is moving, the greater the stopping distance, and the less braking force is needed

Explicação

Questão 22 de 30

1

Preencha os espaços em branco para completar o texto.

Factors that affect thinking distance:

* How you're going - the faster you go, the the stopping distance
* How to you are - this can be affected by , and
* Bad
* (e.g. rain, noise)

Explicação

Questão 23 de 30

1

What does NOT affect braking distance.

Selecione uma das seguintes:

How fast you're going - it takes further to stop
How good you're brakes are - worn or faulty brakes will not have as much force as reliable, new brakes
How good the tyres are- should have a minimum tread depth of 1.6mm to get rid of water in wet conditions
How good the grip of road surface is due to weather conditions (e.g. water, ice, snow, diesel spills) * You don't have as much grip, so travel further before stopping
The make of the car and type of metal it is used from - the stronger the metal frame, the slower the breaking distance

Explicação

Questão 24 de 30

1

Braking and kinetic energy transfer:

To slow down a car, ❌ energy needs to be ❌ into other types of ❌. (e.g.thermal and a little sound)

When the brakes of a car are applied, the ❌ between the ❌ and the ❌ converts kinetic energy into thermal energy, which causes the temperature of the brakes to ❌.

So, work is done by the ❌ force to convert the kinetic energy into thermal energy and a little ❌ energy.

Arraste e solte para completar o texto.

kinetic

thermal

gravitational

converted

swapped

changed

energy

fuel

materials

friction

compression

acceleration

wheels

bonnet

brakes

headlights

increase

decrease

braking

stopping

sound

noise

elastic

Explicação

Questão 25 de 30

1

What will NOT happen to an object when a force is applied to it?

Selecione uma das seguintes:

Stretch
Change in shape
Fold

Explicação

Questão 26 de 30

1

Is an elastic object one that can change shape under an applied force, and then return to its original shape after the force has been removed?

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 27 de 30

1

Preencha os espaços em branco para completar o texto.

When a force does work to change the shape of an elastic object, the object and stores . The is then to energy when the force is and the object returns to its shape.

Explicação

Questão 28 de 30

1

When a spring is supported at the top then a weight is attached to the bottom, it stretches. What is the formula for calculating the force applied to an object, given its extension and spring constant?

Selecione uma das seguintes:

F=KXE

F=force applied (N)
K=spring constand (N/M)
E=extension (m - metres)
J=EXG

J=joules
E=energy
G=gravity
U=FXP

U=U-value
F=Friction
P= Pendulum

Explicação

Questão 29 de 30

1

Hooke's law:

The extension of an elastic object is ❌ to the ❌ until the ❌ is suceeded

Arraste e solte para completar o texto.

directly proportional

the same as

less than

force applied

energy applied

heat applied

limit of proportionality

Weight

Length

Explicação

Questão 30 de 30

1

Is the limit of proportionality the point in which the an elastic object will no longer extend proportionally with the applied force?

Selecione uma das opções:

VERDADEIRO
FALSO

	Criado por holzg001 aproximadamente 9 anos atrás

Covers all aspects of this topic

Physics 2.1 Forces and their effects

Physics 2.1 Forces and their effects

Questão 1 de 30

What is acceleration?

Selecione uma das seguintes:

Explicação

Questão 2 de 30

What is the resultant force?

Selecione uma das seguintes:

Explicação

Questão 3 de 30

If a non-zero resultant force acts on a stationary object?

Selecione uma ou mais das seguintes:

Explicação

Questão 4 de 30

If a resultant force acting on a stationary object is zero it will remain stationary?

Selecione uma das opções:

Explicação

Questão 5 de 30

If the resultant force acting on a moving object is zero?

Selecione uma das seguintes:

Explicação

Questão 6 de 30

If the resultant force acting on an object is non-zero, it will accelerate in the direction of the resultant force?

Selecione uma das opções:

Explicação

Questão 7 de 30

Preencha os espaços em branco para completar o texto.

When the resultant force acts on an object, the object can experience 5 forms of acceleration: , , and

Explicação

Questão 8 de 30

How do you calculate the acceleration produced by a resultant force?

Selecione uma das seguintes:

Explicação

Questão 9 de 30

Preencha os espaços em branco para completar o texto.

When two objects interact, they exert forces on each other that are and

Explicação

Questão 10 de 30

Preencha os espaços em branco para completar o texto.

On the surface of the planet, gravity makes everything towards the and gives everything a

Explicação

Questão 11 de 30

Preencha os espaços em branco para completar o texto.

To calculate the weight of an object using its mass and gravitational field strength: W is M is G is

Explicação

Questão 12 de 30

For a vehicle to travel at a steady speed...

Selecione uma das seguintes:

Explicação

Questão 13 de 30

Preencha os espaços em branco para completar o texto.

The forces that oppose the motion of an object moving through a fluid with the objects .

Explicação

Questão 14 de 30

Preencha os espaços em branco para completar o texto.

Ways of increasing a vehicle's top speed include: * : by altering the of a vehicle to make it more . * Increasing the : meaning the becomes so the drag force on the vehicle will at a speed.

Explicação

Questão 15 de 30

What is terminal velocity?

Selecione uma das seguintes:

Explicação

Questão 16 de 30

Preencha os espaços em branco para completar o texto.

When an object falls through a fluid it initially due to the force of being than the forces. As the object moves , the that act on it . This gradually the until the force is to the force so it wont anymore. It will have reached its () and will fall at a .

Explicação

Questão 17 de 30

Arraste e solte para completar o texto.

Explicação

Questão 18 de 30

A parachute helps to reduce a diver's terminal velocity because it ❌ the surface area which increases the ❌ acting on the diver. This causes the diver to ❌, which ❌ his speed and therefore the ❌.

Arraste e solte para completar o texto.

Explicação

Questão 19 de 30

What is the stopping distance?

Selecione uma ou mais das seguintes:

Explicação

Questão 20 de 30

Selecione das listas do Menu para completar o texto.

To calculate the weight of an object using its mass and gravitational field strength:
W is
M is
G is

Ways of increasing a vehicle's top speed include:

* : by altering the of a vehicle to make it more .

* Increasing the : meaning the becomes so the drag force on the vehicle will at a speed.

Factors that affect thinking distance:

* How you're going - the faster you go, the the stopping distance
* How to you are - this can be affected by , and
* Bad
* (e.g. rain, noise)

Hooke's law:

The extension of an elastic object is ❌ to the ❌ until the ❌ is suceeded