1. Work is done when:
(A) There is no force acting on the object
(B) There is a change in velocity
(C) A force is applied but the object does not move
(D) A force is applied and the object moves in the direction of the force
2. The SI unit of force is:
(A) Watt
(B) Newton
(C) Joule
(D) Meter
3. Energy is defined as:
(A) The distance an object travels
(B) The rate of doing work
(C) The amount of force applied to an object
(D) The ability to do work
4. The formula for calculating work is:
(A) W = m × g
(B) W = F × v
(C) W = F × d
(D) W = P × t
5. Which of the following is the SI unit of energy?
(A) Newton
(B) Watt
(C) Joule
(D) Volt
6. The law of conservation of energy states that:
(A) Energy can be destroyed
(B) Energy cannot be created or destroyed, only transferred or converted
(C) Energy is created when work is done
(D) Energy is destroyed when work is done
7. A force of 10 N is applied to an object, and it moves a distance of 5 m in the direction of the force. How much work is done?
(A) 50 J
(B) 15 J
(C) 5 J
(D) 25 J
8. Which of the following is an example of potential energy?
(A) A moving car
(B) A spinning wheel
(C) A falling rock
(D) A stretched spring
9. Power is defined as:
(A) Speed per unit time
(B) Energy consumed per unit time
(C) Force per unit area
(D) Work done per unit time