Physics 2.1 Forces and their effects

Question 1 of 30

1

What is acceleration?

Select one of the following:

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

Explanation

Question 2 of 30

1

What is the resultant force?

Select one of the following:

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

Explanation

Question 3 of 30

1

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

Select one or more of the following:

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

Explanation

Question 4 of 30

1

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

Select one of the following:

True
False

Explanation

Question 5 of 30

1

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

Select one of the following:

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

Explanation

Question 6 of 30

1

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

Select one of the following:

True
False

Explanation

Question 7 of 30

1

Fill the blank spaces to complete the text.

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

Explanation

Question 8 of 30

1

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

Select one of the following:

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

Explanation

Question 9 of 30

1

Fill the blank spaces to complete the text.

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

Explanation

Question 10 of 30

1

Fill the blank spaces to complete the text.

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

Explanation

Question 11 of 30

1

Fill the blank spaces to complete the text.

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

Explanation

Question 12 of 30

1

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

Select one of the following:

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

Explanation

Question 13 of 30

1

Fill the blank spaces to complete the text.

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

Explanation

Question 14 of 30

1

Fill the blank spaces to complete the text.

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.

Explanation

Question 15 of 30

1

What is terminal velocity?

Select one of the following:

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

Explanation

Question 16 of 30

1

Fill the blank spaces to complete the text.

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 .

Explanation

Question 17 of 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.

Drag and drop to complete the text.

shape

area

gravity

air resistance

same

moon

drag

weight

Explanation

Question 18 of 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 ❌.

Drag and drop to complete the text.

increases

air resistance

slow down

reduces

terminal velocity

Explanation

Question 19 of 30

1

What is the stopping distance?

Select one or more of the following:

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

Explanation

Question 20 of 30

1

Select from the dropdown lists to complete the text.

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 )

Explanation

Question 21 of 30

1

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

Select one of the following:

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

Explanation

Question 22 of 30

1

Fill the blank spaces to complete the text.

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)

Explanation

Question 23 of 30

1

What does NOT affect braking distance.

Select one of the following:

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

Explanation

Question 24 of 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.

Drag and drop to complete the text.

kinetic

thermal

gravitational

converted

swapped

changed

energy

fuel

materials

friction

compression

acceleration

wheels

bonnet

brakes

headlights

increase

decrease

braking

stopping

sound

noise

elastic

Explanation

Question 25 of 30

1

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

Select one of the following:

Stretch
Change in shape
Fold

Explanation

Question 26 of 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?

Select one of the following:

True
False

Explanation

Question 27 of 30

1

Fill the blank spaces to complete the text.

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.

Explanation

Question 28 of 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?

Select one of the following:

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

Explanation

Question 29 of 30

1

Hooke's law:

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

Drag and drop to complete the text.

directly proportional

the same as

less than

force applied

energy applied

heat applied

limit of proportionality

Weight

Length

Explanation

Question 30 of 30

1

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

Select one of the following:

True
False

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Physics 2.1 Forces and their effects

Question 1 of 30

What is acceleration?

Select one of the following:

Explanation

Question 2 of 30

What is the resultant force?

Select one of the following:

Explanation

Question 3 of 30

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

Select one or more of the following:

Explanation

Question 4 of 30

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

Select one of the following:

Explanation

Question 5 of 30

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

Select one of the following:

Explanation

Question 6 of 30

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

Select one of the following:

Explanation

Question 7 of 30

Fill the blank spaces to complete the text.

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

Explanation

Question 8 of 30

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

Select one of the following:

Explanation

Question 9 of 30

Fill the blank spaces to complete the text.

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

Explanation

Question 10 of 30

Fill the blank spaces to complete the text.

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

Explanation

Question 11 of 30

Fill the blank spaces to complete the text.

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

Explanation

Question 12 of 30

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

Select one of the following:

Explanation

Question 13 of 30

Fill the blank spaces to complete the text.

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

Explanation

Question 14 of 30

Fill the blank spaces to complete the text.

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.

Explanation

Question 15 of 30

What is terminal velocity?

Select one of the following:

Explanation

Question 16 of 30

Fill the blank spaces to complete the text.

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 .

Explanation

Question 17 of 30

Drag and drop to complete the text.

Explanation

Question 18 of 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 ❌.

Drag and drop to complete the text.

Explanation

Question 19 of 30

What is the stopping distance?

Select one or more of the following:

Explanation

Question 20 of 30

Select from the dropdown lists to complete the text.

Explanation

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