Physics Practice: Work, Power and Energy (Mock Test 5 - Ultimate Comprehensive)
1. A force $F$ acts on a body and moves it through a displacement $S$. If the angle between them is $\theta$, the work done is maximum when $\theta$ is:
2. Which of the following is the correct relationship between Horse Power (hp) and Watt (W)?
3. A ball of mass $m$ is dropped from height $h$. Its Kinetic Energy at the moment of impact with the ground is:
4. If the momentum of a body is doubled, its Kinetic Energy ($K$) becomes:
5. Which energy conversion occurs in a Microphone?
6. The commercial unit of electrical energy, $1 \text{ kWh}$, is equal to how many Joules?
7. A coolie carrying a load on his head walks on a horizontal platform. Work done by the force of gravity is:
8. In a nuclear reactor, the mass-energy equivalence is governed by which formula?
9. When a spring is compressed, the work done is stored in the form of:
10. Power is a ________ quantity and its S.I. unit is ________.
11. A machine raises a load of $100 \text{ N}$ to a height of $50 \text{ m}$ in $5 \text{ s}$. What is its power?
12. Which law states that energy can neither be created nor destroyed, only transformed?
13. In a pendulum, the Potential Energy is maximum at:
14. If a force is applied perpendicular to the direction of motion, work done is:
15. The energy stored in the food we eat is primarily:
16. Solar cells convert light energy into:
17. A body of mass $2 \text{ kg}$ is moving with a velocity of $4 \text{ m/s}$. Its Kinetic Energy is:
18. The work-energy theorem states that work done is equal to the change in:
19. Which of these is a non-renewable source of energy?
20. What is the work done by a centripetal force on a body moving in a circle?
