Work Power & Energy PYQs - Last 10 Years
JEE Main / Physics / Mechanics / 125 recent questions
PhysicsMechanics2017-2026
Practice 125 JEE Main Physics questions from Work Power & Energy. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
125
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Physics / Mechanics
2017-2026
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84
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2022-2026
125
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2017-2026
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125PYQs
MCQ65.6%
INTEGER34.4%
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#1 Medium64
#2 Easy60
#3 Hard1
84 in last 5 years125 in last 10 years
Last 10 Years Work Power & Energy Questions
Showing 25 of 125 filtered questions.
1Work Power And Energy
A ball of mass 4 kg, moving with a velocity of 10 ms\(-\)1, collides with a spring of length 8 m and force constant 100 Nm\(-\)1. The length of the compressed spring is x m. The value of x, to the nearest integer, is ____________.
INTEGER+4 / -12021
2Work Power And Energy
A boy is rolling a 0.5 kg ball on the frictionless floor with the speed of 20 ms-1. The ball gets deflected by an obstacle on the way. After deflection it moves with 5% of its initial kinetic energy. What is the speed of the ball now?
MCQ+4 / -12021
3Work Power And Energy
Consider a force \(\overrightarrow F = - x\widehat i + y\widehat j\)
. The work done
by this force in moving a particle from point
A(1, 0) to B(0, 1) along the line segment is :
(all quantities are in SI units)
. The work done
by this force in moving a particle from point
A(1, 0) to B(0, 1) along the line segment is :
(all quantities are in SI units)
MCQ+4 / -12020
4Work Power And Energy
A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg. If the frictional force on the elevator is 4000 N, the speed of the elevator at full load is close to : (1 HP = 746 W, g = 10 ms-2)
MCQ+4 / -12020
5Work Power And Energy
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m), th...
INTEGER+4 / -02020
6Work Power And Energy
An elevator in a building can carry a maximum of 10 persons, with the average mass of each
person being 68 kg, The mass of the elevator itself is 920 kg and it moves with a constant speed
of 3 m/s. The frictional force opposing the motion i...
person being 68 kg, The mass of the elevator itself is 920 kg and it moves with a constant speed
of 3 m/s. The frictional force opposing the motion i...
MCQ+4 / -12020
7Work Power And Energy
If the potential energy between two molecules is given by
U = \(- {A \over {{r^6}}} + {B \over {{r^{12}}}}\),
then at equilibrium,
separation between molecules, and the potential energy are :
U = \(- {A \over {{r^6}}} + {B \over {{r^{12}}}}\),
then at equilibrium,
separation between molecules, and the potential energy are :
MCQ+4 / -12020
8Work Power And Energy
A body of mass 2 kg is driven by an engine
delivering a constant power of 1 J/s. The body
starts from rest and moves in a straight line.
After 9 seconds, the body has moved a
distance (in m) _______.
delivering a constant power of 1 J/s. The body
starts from rest and moves in a straight line.
After 9 seconds, the body has moved a
distance (in m) _______.
INTEGER+4 / -02020
9Work Power And Energy
A person pushes a box on a rough horizontal plateform surface. He applies a force of 200 N over a
distance of 15 m. Thereafter, he gets progressively tired and his applied force reduces linearly with
distance to 100 N. The total distance th...
distance of 15 m. Thereafter, he gets progressively tired and his applied force reduces linearly with
distance to 100 N. The total distance th...
MCQ+4 / -12020
10Work Power And Energy
A cricket ball of mass 0.15 kg is thrown
vertically up by a bowling machine so that it
rises to a maximum height of 20 m after leaving
the machine. If the part pushing the ball applies
a constant force F on the ball and moves
horizontally a...
vertically up by a bowling machine so that it
rises to a maximum height of 20 m after leaving
the machine. If the part pushing the ball applies
a constant force F on the ball and moves
horizontally a...
INTEGER+4 / -02020
11Work Power And Energy
A particle is moving unidirectionally on a horizontal plane under the action of a constant power
supplying energy source. The displacement (s) - time (t) graph that describes the motion of the
particle is (graphs are drawn schematically and...
supplying energy source. The displacement (s) - time (t) graph that describes the motion of the
particle is (graphs are drawn schematically and...
MCQ+4 / -12020
12Work Power And Energy
A block starts moving up an inclined plane of inclination 30o with an initial velocity of v0
. It comes
back to its initial position with velocity \({{{v_0}} \over 2}\). The value of the coefficient of kinetic friction between
the block and...
. It comes
back to its initial position with velocity \({{{v_0}} \over 2}\). The value of the coefficient of kinetic friction between
the block and...
INTEGER+4 / -02020
13Work Power And Energy
A small block starts slipping down from a point
B on an inclined plane AB, which is making an angle \(\theta\) with the horizontal section BC is
smooth and the remaining section CA is rough
with a coefficient of friction \(\mu\). It is f...
INTEGER+4 / -02020
14Work Power And Energy
A block of mass m, lying on a smooth horizontal surface, is attached to a sring (of negligible mass) of spring constant k. The other end of the spring is fixed, as shown in the figure. The block is initially at rest in its equilibrium posit...
MCQ+4 / -12019
15Work Power And Energy
A force acts on a 2 kg object so that its position is given as a function of time as x = 3t2 + 5. What is the work done by this force in first 5 seconds ?
MCQ+4 / -12019
16Work Power And Energy
A uniform cable of mass 'M' and length 'L' is
placed on a horizontal surface such that its (1/n)th
part is hanging below the edge of the
surface. To lift the hanging part of the cable upto
the surface, the work done should be :
placed on a horizontal surface such that its (1/n)th
part is hanging below the edge of the
surface. To lift the hanging part of the cable upto
the surface, the work done should be :
MCQ+4 / -12019
17Work Power And Energy
A particle moves in one dimension from rest
under the influence of a force that varies with
the distance travelled by the particle as shown
in the figure. The kinetic energy of the particle
after it has travelled 3m is :
under the influence of a force that varies with
the distance travelled by the particle as shown
in the figure. The kinetic energy of the particle
after it has travelled 3m is :
MCQ+4 / -12019
18Work Power And Energy
A block of mass m is kept on a platform which starts from rest with constant acceleration g/2 upward, as shown in figure. Work done by normal reaction on block in time is -
MCQ+4 / -12019
19Work Power And Energy
A particle which is experiencing a force, given by \(\overrightarrow F = 3\widehat i - 12\widehat j,\) undergoes a displacement of \(\overrightarrow d = 4\overrightarrow i\) particle had a kinetic energy of 3 J at the beginning of the di...
MCQ+4 / -12019
20Work Power And Energy
Two particles of the same mass m are moving in circular orbits because of force, given by \(F\left( r \right) = {{ - 16} \over r} - {r^3}\)
The first particle is at a distance r = 1, and the second, at r = 4. The best estimate for the ratio...
The first particle is at a distance r = 1, and the second, at r = 4. The best estimate for the ratio...
MCQ+4 / -12018
21Work Power And Energy
A body of mass m starts moving from rest along x-axis so that its velocity varies as \(\upsilon = a\sqrt s\) where a is a constant and s is the distance covered by the body. The total work done by all the forces acting on the body in the ...
MCQ+4 / -12018
22Work Power And Energy
A particle is moving in a circular path of radius \(a\) under the action of an attractive potential \(U = - {k \over {2{r^2}}}\) Its total energy is:
MCQ+4 / -12018
23Work Power And Energy
An object is dropped from a height h from the ground. Every time it hits the ground it looses 50% of its kinetic energy. The total distance covered as t \(\to\) \(\infty\) is :
MCQ+4 / -12017
24Work Power And Energy
A body of mass m = 10–2 kg is moving in a medium and experiences a frictional force F = –kv2. Its initial speed is v0 = 10 ms–1. If, after 10 s, its energy is \({1 \over 8}mv_0^2\), the value of k will be:
MCQ+4 / -12017
25Work Power And Energy
A time dependent force F = 6t acts on a particle of mass 1 kg. If the particle starts from rest, the work done
by the force during the first 1 sec. will be:
by the force during the first 1 sec. will be:
MCQ+4 / -12017