# Physics GK 05 - Work, Energy and Power

1).
Which of the following is NOT correct about an inelastic collision?
2).
The dot product of two vectors A and B is equal to the product of magnitude of A and B and __________?
3).
What is the dot product of two perpendicular vectors?
4).
Work done is defined as the dot product of which of the following vectors?
5).
What is the dimensional formula of work done?
6).
Which of the following is NOT correct about units of work:
7).
Work done will NOT be zero in which of the following case/cases?
8).
The work done by a variable force is given by:
9).
Which of the following is NOT a conservative force?
10).
The work done in moving a body over a smooth inclined plane does not depend on which of the following?
11).
What is the absolute unit of power in c.g.s system?
12).
What is the average power consumption of a heartbeat in an adult?
13).
The capacity of a body to do work is known as:
14).
1 electron volt of energy is equal to ____?
15).
Which of the following is/are correct about Kinetic energy?
16).
What will be the work done in holding a 25 kg iron plate for 25 seconds?
17).
What is the coefficient of restitution for a perfectly elastic collision?
18).
What is the effect on velocities of the two bodies of equal masses when they undergo elastic collision in one dimension?
19).
The energy by virtue of its position is known as:
20).
On which of the following quantities, Work done does not depend?
21).
What should be the angle between force and displacement for maximum work to be done?
22).
What happens to the velocity of a light body when it undergoes an elastic collision in one dimension with a very heavy body at rest?
23).
What happens to the velocity of a heavy body when it undergoes an elastic collision in one dimension with a very light body at rest?
24).
Which of the following is NOT an example of conservation of mechanical energy?
25).
What kind of energy is stored in the spring of a watch?