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Work, Energy and Power

Previous year questions with solutions · 2024 – 2026

56Questions
42Papers covered
3.16%Weightage 2026▼ 25% vs last year
’24
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
202615190.793.16% ▼ 25% vs last year
202520191.14.21% ▲ 20.3% vs last year
202421201.13.50%

52 questions · newest paper first · page 1 of 2

Ques. 1JEE Main 2026, 6 April (Morning Shift)

The rain drop of mass 1 g, starts with zero velocity from a height of 1 km. It hits the ground with a speed of 5 m/s. The work done by the unknown resistive force is J. (take g = 10 m/s2)

  1. -8.75
  2. -8.35
  3. -9.55
  4. -9.98
Ques. 2JEE Main 2026, 6 April (Morning Shift)

A smooth inclined plane ends in a vertical circular loop, as shown in the figure. A small body is released from height h as shown. If the body exerts a force of three times its weight on the plane at the highest point of circle then the height h= R. The value of is . [figure]

  1. 2
  2. 4
  3. 3
  4. 6
Ques. 3JEE Main 2026, 6 April (Evening Shift)

A body of mass 1 kg moves along a straight line with a velocity v=2x2. The work done by the body during displacement from x=0 to 5 m is J.

  1. 0
  2. 250
  3. 1250
  4. 1000
Ques. 4JEE Main 2026, 5 April (Evening Shift)

A mass of 1 kg is kept on an inclined plane with 30 inclination with respect to horizontal plane and it is at rest initially. Then the whole assembly is moved up with constant velocity of 4 m/s. The work done by the frictional force in time 2 s is J. (Take g=10 m/s2)

  1. 20
  2. 25
  3. 30
  4. 10
Ques. 5JEE Main 2026, 2 April (Evening Shift)

A spherical ball of mass 2 kg falls from a height of 10 m and is brought to rest after penetrating 10 cm into sand. The average force exerted by sand on the ball is N. (Take g=10 m/s2)

  1. 1980
  2. 2020
  3. 2000
  4. 1000
Ques. 6JEE Main 2026, 24 January (Evening Shift)

In case of vertical circular motion of a particle by a thread of length r, if the tension in the thread is zero at an angle 30 shown in figure, the velocity at the bottom point (A) of the circular path is (g = gravitational acceleration) [figure]

  1. 72gr
  2. 4gr
  3. 52gr
  4. 5gr
Ques. 7JEE Main 2026, 23 January (Morning Shift)

In a perfectly inelastic collision, two spheres made of the same material with masses 15 kg and 25 kg, moving in opposite directions with speeds of 10 m/s and 30 m/s, respectively, strike each other and stick together. The rise in temperature (in ), if all the heat produced during the collision is retained by these spheres, is : (specific heat of sphere material 31 cal/(kg C) and 1 cal = 4.2 J)

  1. 1.75
  2. 1.44
  3. 1.95
  4. 1.15
Ques. 8JEE Main 2026, 23 January (Morning Shift)

A small bob A of mass m is attached to a massless rigid rod of length 1 m pivoted at point P and kept at an angle of 60 with vertical as shown in figure. At distance of 1 m below point P, an identical bob B is kept at rest on a smooth horizontal surface that extends to a circular track of radius R as shown in figure. If bob B just manages to complete the circular path of radius R upto a point Q after being hit elastically by bob A, then radius R is m. [figure]

  1. 15
  2. 2 - 35
  3. 35
  4. 2 + 35
Ques. 9JEE Main 2026, 23 January (Morning Shift)

Two blocks with masses 100 g and 200 g are attached to the ends of springs A and B as shown in figure. The energy stored in A is E. The energy stored in B, when spring constants kA, kB of A and B, respectively satisfy the relation 4kA = 3kB, is : [figure]

  1. 4E
  2. 2E
  3. 43E
  4. 3E
Ques. 10JEE Main 2026, 23 January (Evening Shift)

A bead P sliding on a frictionless semi-circular string (ACB) and it is at point S at t = 0 and at this instant the horizontal component of its velocity is v. Another bead Q of the same mass as P is ejected from point A at t = 0 along the horizontal string AB, with the speed v, friction between the beads and the respective strings may be neglected in both cases. Let tP and tQ be the respective times taken by beads P and Q to reach the point B, then the relation between tP and tQ is [figure]

  1. tP < tQ
  2. tP = tQ
  3. tP > 1.25tQ
  4. tP > tQ
Ques. 11JEE Main 2026, 22 January (Evening Shift)

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are false
  4. Both Statement I and Statement II are true
Ques. 12JEE Main 2026, 21 January (Morning Shift)

Potential energy (V) versus distance (x) is given by the graph. Rank various regions as per the magnitudes of the force (F) acting on a particle from high to low. [figure]

  1. FBC > FAB > FDE > FCD
  2. FBC > FCD > FDE > FAB
  3. FCD > FAB > FBC > FDE
  4. FCD > FDE > FAB > FBC
Ques. 13JEE Main 2026, 21 January (Evening Shift)

A body of mass 2 kg is moving along x-direction such that its displacement as function of time is given by x(t) = t2 + t + m, where = 1 m/s2, = 1 m/s and = 1 m. The work done on the body during the time interval t = 2 s to t = 3 s, is J.

  1. 42
  2. 24
  3. 49
  4. 12
Ques. 14JEE Main 2025, 7 April (Morning Shift)

An object of mass 1000 g experiences a time dependent force F = (2t i + 3t2 j ) N. The power generated by the force at time t is:

  1. (2t2 + 18t3 ) W
  2. (3t3 + 5t5 ) W
  3. (2t3 + 3t5 ) W
  4. (2t2 + 3t3 ) W
Ques. 15JEE Main 2025, 7 April (Evening Shift)

Which one of the following forces cannot be expressed in terms of potential energy?

  1. Frictional force
  2. Coulomb's force
  3. Restoring force
  4. Gravitational force
Ques. 16JEE Main 2025, 4 April (Evening Shift)

A block of mass 25 kg is pulled along a horizontal surface by a force at an angle 45 with the horizontal. The friction coefficient between the block and the surface is 0.25. The block travels at a uniform velocity. The work done by the applied force during a displacement of 5 m of the block is :

  1. 490 J
  2. 970 J
  3. 735 J
  4. 245 J
Ques. 17JEE Main 2025, 3 April (Morning Shift)

A particle is released from height S above the surface of the earth. At certain height its kinetic energy is three times its potential energy. The height from the surface of the earth and the speed of the particle at that instant are respectively.

  1. S4, 3gS2
  2. S2, 3gS2
  3. S4, 3gS2
  4. S2, 3gS2
Ques. 18JEE Main 2025, 3 April (Evening Shift)

Two cylindrical vessels of equal cross sectional area of 2 m2 contain water up to heights 10 m and 6 m, respectively. If the vessels are connected at their bottom then the work done by the force of gravity is (Density of water is 103 kg/m3 and g = 10 m/s2)

  1. 1 105 J
  2. 4 104 J
  3. 8 104 J
  4. 6 104 J
Ques. 19JEE Main 2025, 3 April (Evening Shift)

[figure] Consider two blocks A and B of masses m1 = 10 kg and m2 = 5 kg that are placed on a frictionless table. The block A moves with a constant speed v = 3 m/s towards the block B kept at rest. A spring with spring constant k = 3000 N/m is attached with the block B as shown in the figure. After the collision, suppose that the blocks A and B, along with the spring in constant compression state, move together, then the compression in the spring is, (Neglect the mass of the spring)

  1. 0.3 m
  2. 0.1 m
  3. 0.4 m
  4. 0.2 m
Ques. 20JEE Main 2025, 3 April (Evening Shift)

A block of mass 1 kg, moving along x with speed vi = 10 m/s enters a rough region ranging from x = 0.1 m to x = 1.9 m. The retarding force acting on the block in this range is Fr = -kx, with k = 10 N/m. Then the final speed of the block as it crosses the rough region is:

  1. 4 m/s
  2. 10 m/s
  3. 8 m/s
  4. 6 m/s
Ques. 21JEE Main 2025, 29 January (Morning Shift)

A body of mass ‘m’ connected to a massless and unstretchable string goes in vertical circle of radius ‘R’ under gravity g. The other end of the string is fixed at the center of circle. If velocity at top of circular path is n gR, where, n 1, then ratio of kinetic energy of the body at bottom to that at top of the circle is :

  1. n2+4n2
  2. n+4n
  3. n2n2+4
  4. nn+4
Ques. 22JEE Main 2025, 29 January (Morning Shift)

As shown below, bob A of a pendulum having massless string of length 'R' is released from 60 to the vertical. It hits another bob B of half the mass that is at rest on a frictionless table in the center. Assuming elastic collision, the magnitude of the velocity of bob A after the collision will be (take g as acceleration due to gravity.) [figure]

  1. 43 Rg
  2. 13 Rg
  3. Rg
  4. 23 Rg
Ques. 23JEE Main 2025, 29 January (Evening Shift)

A sand dropper drops sand of mass m(t) on a conveyer belt at a rate proportional to the square root of speed (v) of the belt, i.e., dmdt v. If P is the power delivered to run the belt at constant speed then which of the following relationship is true?

  1. P v
  2. P v
  3. P2 v3
  4. P2 v5
Ques. 24JEE Main 2025, 29 January (Evening Shift)

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the correct answer from the options given below:

  1. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
  2. Both (A) and (R) are true and (R) is the correct explanation of (A)
  3. (A) is false but (R) is true
  4. (A) is true but (R) is false
Ques. 25JEE Main 2025, 28 January (Morning Shift)

A bead of mass 'm' slides without friction on the wall of a vertical circular hoop of radius 'R' as shown in figure. The bead moves under the combined action of gravity and a massless spring (k) attached to the bottom of the hoop. The equilibrium length of the spring is 'R'. If the bead is released from top of the hoop with (negligible) zero initial speed, velocity of bead, when the length of spring becomes 'R', would be (spring constant is 'k', g is acceleration due to gravity) [figure]

  1. 2Rg + kR2m
  2. 3Rg + kR2m
  3. 2Rg + 4kR2m
  4. 2 gR + kR2m
Ques. 26JEE Main 2025, 28 January (Morning Shift)

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R In the light of the above statements, choose the most appropriate answer from the options given below

  1. A is false but R is true
  2. Both A and R are true but R is NOT the correct explanation of A
  3. A is true but R is false
  4. Both A and R are true and R is the correct explanation of A
Ques. 27JEE Main 2025, 28 January (Evening Shift)

A body of mass 4 kg is placed on a plane at a point P having coordinates (3, 4) m. Under the action of force F = (2 i + 3 j) N, it moves to a new point Q having coordinates (6, 10) m in 4 sec. The average power and instantaneous power at the end of 4 sec are in the ratio of :

  1. 4 : 3
  2. 13 : 6
  3. 1 : 2
  4. 6 : 13
Ques. 28JEE Main 2025, 24 January (Morning Shift)

A force F= + x2 acts on an object in the x-direction. The work done by the force is 5 J when the object is displaced by 1 m. If the constant =1 N then will be

  1. 15 N/m2
  2. 10 N/m2
  3. 12 N/m2
  4. 8 N/m2
Ques. 29JEE Main 2025, 22 January (Morning Shift)

A bob of mass m is suspended at a point O by a light string of length l and left to perform vertical motion (circular) as shown in figure. Initially, by applying horizontal velocity v0 at the point ' A ', the string becomes slack when the bob reaches at the point ' D '. The ratio of the kinetic energy of the bob at the points B and C is . [figure]

  1. 4
  2. 1
  3. 2
  4. 3
Ques. 30JEE Main 2025, 22 January (Evening Shift)

A body of mass 100 g is moving in circular path of radius 2 m on vertical plane as shown in figure. The velocity of the body at point A is 10 m/s. The ratio of its kinetic energies at point B and C is : [figure] (Take acceleration due to gravity as 10 m/s2)

  1. 3- 22
  2. 2+ 33
  3. 2+ 23
  4. 3+ 32