AQA GCSE Physics Unit 2.3

Question 1 of 20

1

True or false? Work is done when an object is moved by a force.

Select one of the following:

True
False

Explanation

Question 2 of 20

1

True or false? Work uses a different SI unit to energy.

Select one of the following:

True
False

Explanation

Question 3 of 20

1

Into which form of energy does most energy become when work is done to overcome friction?

Select one of the following:

Thermal
Electric
Sound

Explanation

Question 4 of 20

1

True or false? Gravitational potential energy is energy stored in an object because of its position in the Earth's gravitational field.

Select one of the following:

True
False

Explanation

Question 5 of 20

1

What is the gravitational potential energy of an object of 0.5kg mass if it is lifted by 3m?

Select one of the following:

1.5J
3J
15J
10.5J

Explanation

Question 6 of 20

1

What is the power developed of an object which, when lifted, gains 60J in 10s?

Select one of the following:

600W
6W
60W

Explanation

Question 7 of 20

1

True or false? Kinetic energy is the energy of an object when it is stationary.

Select one of the following:

True
False

Explanation

Question 8 of 20

1

Which of these is the correct formula for kinetic energy?

Select one of the following:

KE = 1/2 * m * v
KE = m * v
KE = 1/2 * m^2 * v
KE = m^2 * v
KE = 1/2 * m * v^2
KE = m * v^2

Explanation

Question 9 of 20

1

True or false? A system that stores energy when a vehicle brakes is known as a kinetic energy recovery system.

Select one of the following:

True
False

Explanation

Question 10 of 20

1

True or false? Momentum is a scalar quantity.

Select one of the following:

True
False

Explanation

Question 11 of 20

1

Which of these formulae is correct for calculating momentum?

Select one of the following:

p = m * v
p = m * v^2
p = m^2 * v
p = 2m * v
p = m * 2v

Explanation

Question 12 of 20

1

True or false? In a closed system, the total momentum before an event is equal to the total momentum after the event.

Select one of the following:

True
False

Explanation

Question 13 of 20

1

Trolley A, 6kg, is travelling in one direction at 4m/s. Trolley B, 7kg, is travelling in the other direction at 3m/s. The two trolleys stick together and move off. What is the velocity of the two trolleys?

Select one of the following:

2.5m/s
3m/s
3.5m/s
4m/s

Explanation

Question 14 of 20

1

True or false? In an explosion, the total momentum is zero.

Select one of the following:

True
False

Explanation

Question 15 of 20

1

True or false? If, in an explosion, two pieces of debris move apart, they will not move with equal and opposite momentum.

Select one of the following:

True
False

Explanation

Question 16 of 20

1

True or false? A front-end collision increases the momentum of the car.

Select one of the following:

True
False

Explanation

Question 17 of 20

1

What does a g-force of 2g mean?

Select one of the following:

The force applied on an object is half its weight
The force applied on an object is twice the gravitational field strength
The force applied on an object is twice its weight

Explanation

Question 18 of 20

1

True or false? If the impact time is increased, the impact force will be increased.

Select one of the following:

True
False

Explanation

Question 19 of 20

1

Which two of these features of car safety are compulsory by UK law?

Select one or more of the following:

Seat belts
Crumple zones
Collapsible steering wheels
Airbags
Side impact bars

Explanation

Question 20 of 20

1

True or false? Child car seats are mandatory in the UK for children younger than 12 years old or shorter than 1.35m.

Select one of the following:

True
False

	Created by Matthew T over 10 years ago

Twenty questions on the third section of Unit 2 of AQA GCSE Physics: Work and energy.

AQA GCSE Physics Unit 2.3

Question 1 of 20

True or false? Work is done when an object is moved by a force.

Select one of the following:

Explanation

Question 2 of 20

True or false? Work uses a different SI unit to energy.

Select one of the following:

Explanation

Question 3 of 20

Into which form of energy does most energy become when work is done to overcome friction?

Select one of the following:

Explanation

Question 4 of 20

True or false? Gravitational potential energy is energy stored in an object because of its position in the Earth's gravitational field.

Select one of the following:

Explanation

Question 5 of 20

What is the gravitational potential energy of an object of 0.5kg mass if it is lifted by 3m?

Select one of the following:

Explanation

Question 6 of 20

What is the power developed of an object which, when lifted, gains 60J in 10s?

Select one of the following:

Explanation

Question 7 of 20

True or false? Kinetic energy is the energy of an object when it is stationary.

Select one of the following:

Explanation

Question 8 of 20

Which of these is the correct formula for kinetic energy?

Select one of the following:

Explanation

Question 9 of 20

True or false? A system that stores energy when a vehicle brakes is known as a kinetic energy recovery system.

Select one of the following:

Explanation

Question 10 of 20

True or false? Momentum is a scalar quantity.

Select one of the following:

Explanation

Question 11 of 20

Which of these formulae is correct for calculating momentum?

Select one of the following:

Explanation

Question 12 of 20

True or false? In a closed system, the total momentum before an event is equal to the total momentum after the event.

Select one of the following:

Explanation

Question 13 of 20

Trolley A, 6kg, is travelling in one direction at 4m/s. Trolley B, 7kg, is travelling in the other direction at 3m/s. The two trolleys stick together and move off. What is the velocity of the two trolleys?

Select one of the following:

Explanation

Question 14 of 20

True or false? In an explosion, the total momentum is zero.

Select one of the following:

Explanation

Question 15 of 20

True or false? If, in an explosion, two pieces of debris move apart, they will not move with equal and opposite momentum.

Select one of the following:

Explanation

Question 16 of 20

True or false? A front-end collision increases the momentum of the car.

Select one of the following:

Explanation

Question 17 of 20

What does a g-force of 2g mean?

Select one of the following:

Explanation

Question 18 of 20

True or false? If the impact time is increased, the impact force will be increased.

Select one of the following:

Explanation

Question 19 of 20

Which two of these features of car safety are compulsory by UK law?

Select one or more of the following:

Explanation

Question 20 of 20

True or false? Child car seats are mandatory in the UK for children younger than 12 years old or shorter than 1.35m.