Work, Energy, and Power: Interactive Learning Quizzes for Sixth Form Physics

Question 1

The rate at which work is done is called:

Accepted Answer

Power

Answer

Energy

Answer

Force

Answer

Work

Question 2

A 60-watt light bulb is switched on for 5 hours. Calculate the energy consumed.

Accepted Answer

300 watt-hours (Wh)

Answer

300 joules (J)

Answer

300 kilojoules (kJ)

Answer

300 kilowatt-hours (kWh)

Question 3

In an elastic collision, which of the following is conserved?

Accepted Answer

Both momentum and kinetic energy

Answer

Momentum

Answer

Kinetic energy

Answer

Neither momentum nor kinetic energy

Question 4

Which of the following is classified as a lever?

Accepted Answer

Wheel and axle

Answer

Pulley

Answer

Inclined plane

Answer

Screw

Question 5

Identify the renewable energy source from the options.

Accepted Answer

Wind

Answer

Coal

Answer

Natural gas

Answer

Nuclear

Question 6

A force of 20 Newtons is applied to an object over a distance of 5 meters. Calculate the work done.

Accepted Answer

100 Joules

Answer

20 Joules

Answer

5 Joules

Answer

15 Joules

Question 7

Which of the following is the formula for kinetic energy?

Accepted Answer

Ek = 1/2 mv^2

Answer

Ek = mv

Answer

Ek = 1/2 mv

Answer

Ek = mv^2

Question 8

Which of the following is a form of non-renewable energy?

Accepted Answer

Fossil fuels

Answer

Solar energy

Answer

Wind energy

Answer

Hydroelectric energy

Question 9

At the highest point of its trajectory, a ball thrown vertically upward has:

Accepted Answer

Zero kinetic energy and maximum potential energy

Answer

Zero potential energy and maximum kinetic energy

Answer

Zero both kinetic and potential energies

Answer

Maximum both kinetic and potential energies

Question 10

A force of 10 N is used to move an object a distance of 5 m. What is the work done by the force?

Accepted Answer

50 J

Answer

10 J

Answer

100 J

Answer

500 J

Question 11

Which method is the most efficient for transferring energy over long distances?

Accepted Answer

Electrical transmission

Answer

Mechanical transmission

Answer

Thermal conduction

Answer

Sound waves

Question 12

According to the principle of conservation of energy:

Accepted Answer

Total energy in a closed system is constant

Answer

Energy can be created or destroyed

Answer

Energy can be transformed from one form to another

Answer

Energy is proportional to the mass of an object

Question 13

Which of the following is a renewable energy source?

Accepted Answer

Solar power

Answer

Fossil fuels

Answer

Nuclear power

Answer

Coal

Question 14

Power is defined as:

Accepted Answer

Work done per unit time

Answer

Energy stored per unit time

Answer

Force applied per unit time

Answer

Displacement per unit time

Question 15

What is the formula for gravitational potential energy?

Accepted Answer

PE = mgh

Answer

PE = mgv

Answer

PE = mgh^2

Answer

PE = mgv^2

Question 16

The SI unit of energy is:

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Hertz

Question 17

Which of the following laws states that energy cannot be created or destroyed, only transferred or transformed?

Accepted Answer

Law of Conservation of Energy

Answer

Newton's First Law

Answer

Law of Thermodynamics

Answer

Ohm's Law

Question 18

Which of the following is an example of potential energy?

Accepted Answer

A stretched rubber band

Answer

A ball rolling down a slope

Answer

A flowing river

Answer

A burning log

Question 19

The efficiency of a machine is defined as:

Accepted Answer

Output energy divided by Input energy

Answer

Input energy divided by Output energy

Answer

Output power divided by Input power

Answer

Input power divided by Output power

Question 20

Which device is used to measure power consumption?

Accepted Answer

Wattmeter

Answer

Voltmeter

Answer

Ammeter

Answer

Ohmmeter

Question 21

Which of the following is a non-conservative force?

Accepted Answer

Friction

Answer

Gravity

Answer

Tension

Answer

Spring force

Question 22

The SI unit of power is:

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Horsepower

Question 23

A machine has an efficiency of 60%. If the input power is 200 Watts, what is the output power?

Accepted Answer

120 W

Answer

60 W

Answer

200 W

Answer

240 W

Question 24

Which of the following is a non-renewable energy source?

Accepted Answer

Fossil fuels

Answer

Nuclear power

Answer

Solar energy

Answer

Wind energy

Question 25

Which of the following is a form of kinetic energy?

Accepted Answer

Motion of a body

Answer

Gravitational energy

Answer

Elastic energy

Answer

Thermal energy

Question 26

Which of the following is the first law of thermodynamics?

Accepted Answer

Energy can be transformed from one form to another.

Answer

Energy can be created or destroyed.

Answer

Energy can be lost or gained.

Answer

Energy is always constant.

Question 27

Which of the following is NOT a unit of energy?

Accepted Answer

Ampere

Answer

Joule

Answer

Watt

Answer

Calorie

Question 28

A car accelerates from rest to a speed of 20 m/s in 10 seconds. If the mass of the car is 1000 kg, what is the power required to accelerate the car?

Accepted Answer

40 kW

Answer

20 kW

Answer

10 kW

Answer

30 kW

Question 29

Which of the following is stored in a stretched elastic band?

Accepted Answer

Elastic potential energy

Answer

Kinetic energy

Answer

Gravitational potential energy

Answer

Chemical energy

Question 30

Which of the following energy transformations occurs when a solar cell generates electricity?

Accepted Answer

Light energy to electrical energy

Answer

Chemical energy to light energy

Answer

Light energy to chemical energy

Answer

Electrical energy to light energy

Question 31

What is the Standard International unit (SI unit) of energy?

Accepted Answer

Joule (J)

Answer

Watt (W)

Answer

Newton (N)

Answer

Kilogram (kg)

Question 32

Which of the following is NOT a recognized form of energy?

Accepted Answer

Velocity

Answer

Kinetic energy

Answer

Potential energy

Answer

Heat

Question 33

Identify the correct formula for calculating potential energy due to gravity.

Accepted Answer

PE = mgh

Answer

PE = 1/2mv^2

Answer

PE = kx^2

Answer

PE = qV

Question 34

Which of the following is an example of a renewable energy source?

Accepted Answer

Wind power

Answer

Fossil fuels

Answer

Nuclear power

Answer

Coal

Question 35

An object of mass 5 kg moves with a velocity of 10 m/s. Calculate its kinetic energy.

Accepted Answer

500 J

Answer

250 J

Answer

750 J

Answer

1000 J

Question 36

Which of the following is the SI unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Hertz

Question 37

A force of 500 N is applied to an object that moves 10 m. Calculate the work done by the force:

Accepted Answer

500 J

Answer

50 J

Answer

100 J

Answer

1000 J

Question 38

Which of the following is not a form of energy?

Accepted Answer

Momentum

Answer

Kinetic energy

Answer

Potential energy

Answer

Heat energy

Question 39

The kinetic energy of an object moving with a velocity v is proportional to:

Accepted Answer

v^2

Answer

v

Answer

v^3

Answer

1/v

Question 40

The work done by a force is:

Accepted Answer

Force multiplied by distance

Answer

Force multiplied by time

Answer

Force multiplied by velocity

Answer

Force multiplied by acceleration

Question 41

A machine with an efficiency of 75% lifts an object through a height of 2 m. Calculate the input energy needed.

Accepted Answer

5.33 J

Answer

2.67 J

Answer

7.5 J

Question 42

A box is pushed across a horizontal floor with a constant force of 10 Newtons. If the box moves a distance of 5 meters, what is the work done on the box?

Accepted Answer

50 Joules

Answer

2 Joules

Answer

15 Joules

Answer

100 Joules

Question 43

A car with a mass of 1000 kilograms is traveling at a speed of 20 meters per second. What is the kinetic energy of the car?

Accepted Answer

200,000 Joules

Answer

400,000 Joules

Answer

20,000 Joules

Answer

10,000 Joules

Question 44

A cyclist rides uphill at a constant speed. Which statement accurately describes the cyclist's energy changes?

Accepted Answer

The cyclist's kinetic energy stays the same, but their potential energy increases.

Answer

The cyclist's kinetic energy and potential energy both increase.

Answer

The cyclist's kinetic energy and potential energy both remain constant.

Question 45

A 50 kg box is pushed along a horizontal floor with a constant force of 20 N. The box moves 10 meters. If the coefficient of kinetic friction between the box and the floor is 0.2, what is the work done by friction?

Accepted Answer

-98 Joules

Answer

98 Joules

Answer

100 Joules

Answer

-100 Joules

Question 46

A roller coaster car starts from rest at the top of a 50-meter-high hill. If the car has a mass of 1000 kg, what is its speed at the bottom of the hill, assuming no friction?

Accepted Answer

31.3 m/s

Answer

44.3 m/s

Answer

10 m/s

Answer

22.1 m/s

Question 47

A 100-watt light bulb is left on for 5 hours. How much energy is consumed by the light bulb?

Accepted Answer

1.8 Megajoules (MJ)

Answer

500 Joules

Answer

5000 Joules

Answer

1800 Joules

Question 48

Which of the following is NOT a unit of energy?

Accepted Answer

Newton

Answer

Joule

Answer

Watt-hour

Answer

Kilojoule

Question 49

A box is pushed across a smooth, horizontal floor with a constant force of 10 Newtons. If the box moves a distance of 5 meters, how much work is done on the box?

Accepted Answer

50 Joules

Answer

15 Joules

Answer

100 Joules

Answer

2 Joules

Question 50

A roller coaster car is moving at 20 meters per second at the top of a hill. If it has a mass of 500 kilograms, what is its kinetic energy?

Accepted Answer

100,000 Joules

Answer

200,000 Joules

Answer

50,000 Joules

Answer

2500 Joules

Question 51

A car engine does 10,000 Joules of work in 5 seconds. What is the power output of the engine?

Accepted Answer

2000 Watts

Answer

500 Watts

Answer

50,000 Watts

Answer

200 Watts

Question 52

A ball is thrown vertically upwards. Which of the following statements is true about the ball's energy as it rises?

Accepted Answer

Its kinetic energy decreases and its potential energy increases.

Answer

Its kinetic energy and potential energy both increase.

Answer

Its kinetic energy and potential energy both decrease.

Question 53

Which of the following is NOT a form of energy?

Accepted Answer

Force

Answer

Heat

Answer

Light

Question 54

The principle of conservation of energy states that:

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed.

Answer

The total energy of a closed system always increases.

Answer

Energy is always lost as heat during transformations.

Question 55

A cyclist is riding uphill. What happens to the cyclist's kinetic energy and potential energy as they climb?

Accepted Answer

Kinetic energy decreases, potential energy increases.

Answer

Both kinetic and potential energy increase.

Answer

Kinetic energy increases, potential energy decreases.

Question 56

A hydroelectric dam generates electricity by:

Accepted Answer

Converting gravitational potential energy of water into kinetic energy and then electrical energy.

Answer

Using nuclear fission to release energy.

Answer

Burning fossil fuels to produce steam.