PATHAK COACHING CENTRE WORK ENERGY AND POWER ASSIGNMENT 7888381908
OBJECTIVE TYPE OF QUESTIONS (1 MARK):
1) Which of the following is equal with newton – meter?
a) joule
b) Horse power
c) Watt
d) Pascal
2) A particle is thrown upward with some kinetic energy. What happens to its kinetic energy at the highest
point?
a) Its kinetic energy is lost
b) Its kinetic energy is absorbed by the air
c) Its kinetic energy is converted into potential energy
d) Its kinetic energy remains same.
3) A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities
remain constant during the fall?
a) Kinetic energy
b) Potential energy
c) Total mechanical energy
d) Total linear momentum
4) During inelastic collision between two bodies, which of the following quantities always remain
conserved?
a) Total kinetic energy
b) Total mechanical energy
c) Total linear momentum
d) Speed of each body
5) What is the smallest unit of power?
a) watt
b) kilowatt
c) Horse power
d) milliwatt
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, PATHAK COACHING CENTRE WORK ENERGY AND POWER ASSIGNMENT 7888381908
6) If the velocity of the object is increased by 0.1%, then the kinetic energy is increased by
a) 0.1%
b) 0.2%
c) 0.4%
d) 0.01%
7) A body of mass 1 kg is rotating in a circular path of radius 1m with constant velocity of 5
rev/sec. the work done in one complete revolution is
a) 5 J
b) 2.5 J
c) 12.5 J
d) 0 J
8) Work done by a person against friction force always results in a:
a) loss of kinetic energy
b) loss of potential energy
c) gain in kinetic energy
d) None of them
9) Consider 2 balls A and B of same mass. The potential energy of ball A is thrice that of ball B.
how high is ball A compared to ball B?
a) Same height as ball B
b) Twice as high as ball B
c) Thrice as high as ball B
d) Four times as high as ball B
10) A spring with an initial stretch of 0.2 m has a force constant 10 N/m. When the stretch is
changed to 0.25 m, the increase in potential energy is:
a) 0.2 J
b) 0.3 J
c) 0.1 J
d) 0.5 J
11) The potential energy of a system increases, if work is done
a) By the system against a conservative force
b) By the system against a non-conservative force
c) Upon the system by a conservative force
d) Upon the system by a non-conservative force
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OBJECTIVE TYPE OF QUESTIONS (1 MARK):
1) Which of the following is equal with newton – meter?
a) joule
b) Horse power
c) Watt
d) Pascal
2) A particle is thrown upward with some kinetic energy. What happens to its kinetic energy at the highest
point?
a) Its kinetic energy is lost
b) Its kinetic energy is absorbed by the air
c) Its kinetic energy is converted into potential energy
d) Its kinetic energy remains same.
3) A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities
remain constant during the fall?
a) Kinetic energy
b) Potential energy
c) Total mechanical energy
d) Total linear momentum
4) During inelastic collision between two bodies, which of the following quantities always remain
conserved?
a) Total kinetic energy
b) Total mechanical energy
c) Total linear momentum
d) Speed of each body
5) What is the smallest unit of power?
a) watt
b) kilowatt
c) Horse power
d) milliwatt
1|Page
, PATHAK COACHING CENTRE WORK ENERGY AND POWER ASSIGNMENT 7888381908
6) If the velocity of the object is increased by 0.1%, then the kinetic energy is increased by
a) 0.1%
b) 0.2%
c) 0.4%
d) 0.01%
7) A body of mass 1 kg is rotating in a circular path of radius 1m with constant velocity of 5
rev/sec. the work done in one complete revolution is
a) 5 J
b) 2.5 J
c) 12.5 J
d) 0 J
8) Work done by a person against friction force always results in a:
a) loss of kinetic energy
b) loss of potential energy
c) gain in kinetic energy
d) None of them
9) Consider 2 balls A and B of same mass. The potential energy of ball A is thrice that of ball B.
how high is ball A compared to ball B?
a) Same height as ball B
b) Twice as high as ball B
c) Thrice as high as ball B
d) Four times as high as ball B
10) A spring with an initial stretch of 0.2 m has a force constant 10 N/m. When the stretch is
changed to 0.25 m, the increase in potential energy is:
a) 0.2 J
b) 0.3 J
c) 0.1 J
d) 0.5 J
11) The potential energy of a system increases, if work is done
a) By the system against a conservative force
b) By the system against a non-conservative force
c) Upon the system by a conservative force
d) Upon the system by a non-conservative force
2|Page
