# Physics Quiz Questions for Competitive Exams – Physics Online GK

1. Name an object which has no potential, energy but has only kinetic energy:

2. What do you mean by a potential energy?

Answer: Potential energy is the stored energy.

3. What is the escape velocity from the moon?

4. Which is the direction of rotation of a synchronous satellite of earth?

5. Which force is needed to change the direction of a moving body?

6. The momentum of a body depends on what?

7. What is the formula for potential energy?

8. What is the co-efficient of restitution e for a perfectly, elastic collision?

9. What is the co-efficient of restitution e for a perfectly inelastic collision?

10. How many times is the energy increased if the unit of force and length be each increased by four times?

11. What is the mechanical advantage in a machine where a resistance W is overcome by applying an effort p?

12. How much work a man does when he pushes a wall and fails to displace it?

13. Why does an athlete run some distance before taking a long jump?

Answer: By running the athlete gives himself larger inertia of motion.

14. Which force done by the system will increase the potential energy of the system?

15. Two particles of masses 1 g and 4 g are moving with equal linear momenta. What is the ratio of their kinetic energies?

16. An engine develops 10 kw of power. How much time will it take to lift a mass of 200 kg to height of 40 meter (g = 10 ms2)

17. What is called the energy, which an electron acquires when accelerated through a potential difference of 1 voit?