WBJEE SERIES Physics
Work Energy And Power
6 previous year questions.
Volume: 6 Ques
Yield: Medium
High-Yield Trend
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2023 1
2019 1
2018 2
2013 1
2010 Chapter Questions 6 MCQs
01
PYQ 2010
medium
physics ID: wbjee-20
A body is projected horizontally with a velocity of at an angle with the horizontal. The kinetic energy at the highest point is of the initial kinetic energy. The value of is
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02
PYQ 2013
medium
physics ID: wbjee-20
A block of mass is hanging over a frictionless light fixed pulley by an inextensible string of negligible mass. The other end of the string is pulled by a constant force in the verticaly downward direction. The linear momentum of the block increase by in after the block starts from rest. Then, (given )
1
The tension in the string is F
2
The tension in the string is 3N
3
The work done by the tension on the block is 20 J during this 1 s
4
The work done against the force of gravity is 10 J
03
PYQ 2013
medium
physics ID: wbjee-20
A bullet of mass travelling with a speed hits a block of mass initially at rest and gets embedded in it. The combined system is free to move and there is no other force acting on the system. The heat generated in the process will be
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04
PYQ 2018
medium
physics ID: wbjee-20
In a triangle , the sides and are represented by the vectors and respectively. Calculate the angle
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05
PYQ 2019
easy
physics ID: wbjee-20
A body starts from rest, under the action of an engine working at a constant power and moves along a straight line. The displacement S is given as a function of time (t) as
1
S = at + bt , a, b are constants
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S = bt , b is a constant
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s=a t3/2,a is a constant
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S = at, a is a constant
06
PYQ 2023
hard
physics ID: wbjee-20
There are n elastic balls placed on a smooth horizontal plane. The masses of the balls are m, , ........ respectively. If the first ball hits the second ball with velocity V0, then the velocity of the nth ball will be,
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V0