Work, Energy, and Power in Mechanics: Interactive Learning Quizzes

Question 1

Which of the following is **not** a form of energy?

Accepted Answer

Momentum

Answer

Kinetic energy

Answer

Potential energy

Answer

Thermal energy

Question 2

The law of conservation of energy states that:

Accepted Answer

Energy cannot be created or destroyed, only transferred or changed from one form to another

Answer

Energy can be created but not destroyed

Answer

Energy can be destroyed but not created

Answer

Energy can be both created and destroyed

Question 3

Which of the following is the SI unit of work?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kilogram

Question 4

Power is defined as:

Accepted Answer

Work done per unit time

Answer

Force applied over distance

Answer

Energy stored in an object

Answer

Momentum of an object

Question 5

Which of the following is a unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Kilogram

Question 6

Which of the following is a renewable source of energy?

Accepted Answer

Solar power

Answer

Fossil fuels

Answer

Nuclear power

Answer

Coal

Question 7

Which unit is used to measure energy?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Volt

Question 8

Which of the following is not a form of energy?

Accepted Answer

Momentum

Answer

Kinetic energy

Answer

Potential energy

Answer

Thermal energy

Question 9

Power is defined as:

Accepted Answer

Work done per unit time

Answer

Force applied over a distance

Answer

Energy stored in an object

Answer

Rate of change of momentum

Question 10

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

Accepted Answer

Maximum potential energy and zero kinetic energy

Answer

Maximum kinetic energy and zero potential energy

Answer

Zero kinetic energy and potential energy

Answer

Maximum kinetic energy and potential energy

Question 11

Which factor does not influence the amount of work done?

Accepted Answer

Speed of the object

Answer

Magnitude of applied force

Answer

Distance over which force is applied

Answer

Angle between force and displacement

Question 12

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

Accepted Answer

Velocity

Answer

Kinetic energy

Answer

Potential energy

Answer

Heat energy

Question 13

What is the SI unit of measurement for energy?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kilogram

Question 14

What is the formula used to calculate kinetic energy?

Accepted Answer

Ek = 1/2 mv^2

Answer

Ek = mv

Answer

Ek = mgh

Answer

Ek = 1/2 kx^2

Question 15

As a ball is launched vertically upward, what occurs at the highest point of its trajectory?

Accepted Answer

The ball possesses zero kinetic energy and maximum potential energy

Answer

The ball possesses maximum kinetic energy and zero potential energy

Answer

The ball possesses maximum kinetic energy and maximum potential energy

Answer

The ball possesses zero kinetic energy and zero potential energy

Question 16

Which type of heat engine boasts the highest efficiency?

Accepted Answer

Carnot engine

Answer

Stirling engine

Answer

Diesel engine

Answer

Steam engine

Question 17

The unit of energy is

Accepted Answer

Joule

Answer

Newton

Answer

Metre

Answer

Second

Question 18

Which of the following is a conservative force?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Air resistance

Question 19

The formula for kinetic energy is

Accepted Answer

Ek = 1/2 mv^2

Answer

Ek = mv

Answer

Ek = mv^2

Answer

Ek = 1/2 m^2 v

Question 20

The unit of power is:

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Metre per second

Question 21

The formula for power is

Accepted Answer

P = W/t

Answer

P = Wt

Answer

P = t/W

Answer

P = W^2 t

Question 22

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

Accepted Answer

Fossil fuels

Answer

Wind

Answer

Hydroelectric

Answer

Solar

Question 23

According to the first law of thermodynamics, energy can be

Accepted Answer

Transferred and transformed

Answer

Created and destroyed

Answer

Stored and released

Answer

Lost and gained

Question 24

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

Accepted Answer

Heat energy

Answer

Kinetic energy

Answer

Potential energy

Answer

Elastic energy

Question 25

Which of the following is the SI unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Kilogram

Question 26

Which of the following is an example of potential energy?

Accepted Answer

Chemical energy

Answer

Electrical energy

Answer

Kinetic energy

Answer

Thermal energy

Question 27

A hydroelectric power plant converts the energy of falling water into:

Accepted Answer

Electrical energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Nuclear energy

Question 28

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

Accepted Answer

Fossil fuels

Answer

Nuclear energy

Answer

Solar energy

Answer

Hydroelectric energy

Question 29

A machine converts half of the input energy into usable work. What is the efficiency of this machine?

Accepted Answer

50%

Answer

25%

Answer

75%

Question 30

Which of the following is not considered a form of energy?

Accepted Answer

Velocity

Answer

Kinetic energy

Answer

Electrical energy

Answer

Magnetic energy

Question 31

A force of 50 newtons is applied to move an object over a distance of 10 meters. How much work is done?

Accepted Answer

500 joules

Answer

5 joules

Answer

50 joules

Answer

5000 joules

Question 32

Which of the following is a unit used to quantify energy?

Accepted Answer

Joule

Answer

Watt

Answer

Newton

Answer

Meter

Question 33

Which of the following is a conservative force?

Accepted Answer

Gravitational force

Answer

Frictional force

Answer

Tension force

Answer

Air resistance

Question 34

Which of the following is considered a renewable energy source?

Accepted Answer

Solar energy

Answer

Coal

Answer

Natural gas

Answer

Nuclear energy

Question 35

What is the SI unit for energy?

Accepted Answer

Joule

Answer

Watt

Answer

Newton

Answer

Kilogram

Question 36

A car accelerates from rest to a speed of 10 m/s over 5 seconds. If the mass of the car is 1000 kg, calculate the power developed by the car's engine during this time.

Accepted Answer

2 kW

Answer

1 kW

Answer

5 kW

Answer

10 kW

Question 37

Identify the non-conservative force among the following:

Accepted Answer

Friction

Answer

Gravity

Answer

Tension

Answer

Spring force

Question 38

What is the formula for calculating the potential energy of an object at a height 'h' above the ground?

Accepted Answer

mgh

Answer

1/2 mv^2

Answer

F/d

Answer

mg

Question 39

Which of the following is a renewable energy source?

Accepted Answer

Solar

Answer

Coal

Answer

Natural gas

Answer

Nuclear

Question 40

Define work done on an object.

Accepted Answer

Force applied multiplied by distance moved in the direction of the force

Answer

Force applied multiplied by distance moved perpendicular to the force

Answer

Change in kinetic energy

Answer

Change in potential energy

Question 41

Which of the following is not considered a form of energy?

Accepted Answer

Momentum

Answer

Heat

Answer

Sound

Answer

Light

Question 42

A ball of mass 0.5 kg is thrown vertically upward with a velocity of 10 m/s. Determine the maximum height it will reach.

Accepted Answer

5 m

Answer

10 m

Answer

15 m

Answer

20 m

Question 43

Which of the following is the SI unit of energy?

Accepted Answer

Joule

Answer

Newton meter

Answer

Watt-hour

Answer

Kilowatt-hour

Question 44

Which of the following is a form of potential energy stored in an object due to its height?

Accepted Answer

Gravitational potential energy

Answer

Kinetic energy

Answer

Elastic potential energy

Answer

Chemical potential energy

Question 45

Which of the following is a renewable source of energy?

Accepted Answer

Wind

Answer

Coal

Answer

Natural gas

Answer

Nuclear

Question 46

A heat engine operates with an efficiency of 40%. What percentage of the input heat is converted into useful work?

Accepted Answer

40%

Answer

50%

Answer

60%

Answer

70%

Question 47

At the maximum height of a vertically thrown ball, which of the following is zero?

Accepted Answer

Kinetic energy

Answer

Potential energy

Answer

Total energy

Answer

Momentum

Question 48

A force of 10 N moves a block through a displacement of 5 m. What is the work done?

Accepted Answer

50 J

Answer

2 J

Answer

10 J

Answer

100 J

Question 49

A machine with an efficiency of 75% receives an input power of 100 W. What is the output power?

Accepted Answer

75 W

Answer

25 W

Answer

125 W

Answer

200 W

Question 50

Which of the following is a vector quantity?

Accepted Answer

Force

Answer

Mass

Answer

Energy

Answer

Temperature