Work, Energy, and Power MCQs

1. The SI unit of work is:
(A) Newton
(B) Watt
(C) Joule
(D) Kilogram

2. Work is done when:
(A) Force is applied but there is no displacement
(B) A force is applied and the object moves in the direction of the force
(C) There is no force but displacement occurs
(D) Force is applied, but there is no change in energy

3. The formula for calculating work done is:
(A) W = F × v
(B) W = F × d
(C) W = m × g × h
(D) W = P × t

4. Which of the following is a unit of power?
(A) Watt
(B) Joule
(C) Newton
(D) Meter

5. If an object moves with a constant velocity, the work done on the object is:
(A) Positive
(B) Negative
(C) Zero
(D) Infinite

6. Energy can be converted from one form to another, but it cannot be:
(A) Created or destroyed
(B) Transferred
(C) Measured
(D) Reduced

7. What is the unit of kinetic energy?
(A) Joule
(B) Watt
(C) Newton
(D) Meter

8. Power is defined as:
(A) Work done per unit time
(B) Energy consumed per unit time
(C) Force applied per unit time
(D) Speed per unit time

9. The energy possessed by a body due to its motion is called:
(A) Potential energy
(B) Kinetic energy
(C) Thermal energy
(D) Mechanical energy

10. Which of the following statements is true about potential energy?
(A) It depends on the mass and velocity of an object
(B) It is always zero
(C) It is stored energy due to an object’s position
(D) It is never converted to kinetic energy