Work and Energy Quiz

What is the formula for work done when force and displacement are given?

• W = F + d

• W = F ⋅ d

• W = Fd cos(θ)

• W = Fd sin(θ)

When is work done equal to zero?

• Force and displacement are perpendicular.

• No force is applied.

• There is no displacement.

• All of the above.

Work done is a measure of:

• Energy transferred.

• Speed of an object.

• The force acting on an object.

• The potential energy of an object.

If a force of 10 N moves an object 5 m in the direction of the force, what is the work done?

• 50 J

• 5 J

• 15 J

• 2 J

What is the SI unit of work done?

• Joule (J)

• Newton (N)

• Watt (W)

• Pascal (Pa)

A box is pushed with a force of 20 N across a distance of 3 m at an angle of 30°. Calculate the work done.

• 30 J

• 52 J

• 60 J

• 51.96 J

If the force is doubled and the displacement remains the same, what happens to the work done?

• It doubles.

• It halves.

• It remains the same.

• It becomes zero.

Work done on an object is negative when:

• Force is perpendicular to displacement.

• Force and displacement are in the same direction.

• Force and displacement are in opposite directions.

• No force is applied.

A force of 100 N is applied at an angle of 90° to the displacement of 10 m. The work done is:

• 1000 J

• 100 J

• 10 J

• 0 J

A 5 kg object is lifted vertically to a height of 10 m. The work done by gravity is:

• -490 J

• 490 J

• 0 J

• -980 J