Work and Energy Quiz

What is the SI unit of work?

• Joule

• Newton

• Watt

• Meter

When is work said to be done on an object?

• The object is at rest.

• A force is applied, but the object does not move.

• A force is applied, and the object is displaced in the direction of the force.

• None of the above

Work is said to be negative when:

• The force and displacement are in the same direction.

• The force is perpendicular to displacement.

• The force and displacement are in opposite directions.

• The object does not move.

Which of the following is an example of work being done?

• A book lying on a table.

• A person pushing a wall that does not move.

• A child pulling a toy car on the floor.

• A person holding a heavy box stationary.

Which type of energy does a moving object possess?

• Potential energy

• Kinetic energy

• Mechanical energy

• Thermal energy

What does kinetic energy depend on?

• Only mass

• Only velocity

• Both mass and velocity

• Neither mass nor velocity

A force of 20 N is applied to move an object 5 m in the direction of the force. The work done is:

• 25 J

• 50 J

• 100 J

• 200 J

A body possesses potential energy due to:

• Its motion

• Its shape

• Its position

• Both position and shape

Which of these activities involves potential energy?

• Running on a track

• Water stored in a dam

• A rolling ball

• Burning fuel

A windmill converts:

• Wind energy into electrical energy

• Electrical energy into mechanical energy

• Kinetic energy into sound energy

• Potential energy into thermal energy