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## Work, Energy and Power

### Physics

#### Previous Years Questions

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An electric lift with a maximum load of 2000 kg (lift + passengers) is moving up with a constant speed of 1.5 ms$$-$$1. ...
NEET 2022
Water falls from a height of 60m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10%...
NEET 2021
A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three time...
NEET 2021
A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in meter. Work done by this force to m...
NEET 2019
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes ...
NEET 2018
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest aft...
NEET 2018
Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m s$$... NEET 2017 What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete ... NEET 2016 Phase 1 A body of mass 1 kg begins to move under the action of a time dependent force$$\overrightarrow F = \left( {2t\widehat ...
NEET 2016 Phase 1
A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magni...
NEET 2016 Phase 1
A particle moves from a point $$\left( { - 2\widehat i + 5\widehat j} \right)$$ to $$\left( {4\widehat j + 3\widehat k} ... NEET 2016 Phase 2 A bullet of mass 10 g moving horizontally with a velocity of 400 m s$$-$$1 strikes a wood block of mass 2 kg which is su... NEET 2016 Phase 2 Two identical balls A and B having velocities of 0.5 m s$$-$$1 and$$-$$0.3 m s$$-$$1 respectively collide elastically... NEET 2016 Phase 2 Two similar springs P and Q have spring constants KP and KQ, such that KP &gt; KQ. They are stretched first by the same ... AIPMT 2015 Cancelled Paper Two particles of masses m1, m2 move with initial velocities u1 and u2. On collision, one of the particles get excited t... AIPMT 2015 Cancelled Paper On a frictionless surface, a block of mass M moving at speed v collides elastically with another block of same mass M wh... AIPMT 2015 A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the... AIPMT 2015 Cancelled Paper A block of mass 10 kg, moving in x direction with a constant speed of 10 m s$$-$$1, is subjected to a retarding force F ... AIPMT 2015 Cancelled Paper The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the d... AIPMT 2015 A ball is thrown vertically downwards from a height of 20 m with an initial velocity v0. It collides with the ground, lo... AIPMT 2015 Two particles A and B, move with constant velocities$$\overrightarrow {{v_1}} $$and$$\overrightarrow {{v_2}} $$. At t... AIPMT 2015 A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) ... AIPMT 2014 One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same... NEET 2013 (Karnataka) A particle with total energy E is moving in a potential energy region U(x). Motion of the particle is restricted to the ... NEET 2013 (Karnataka) A uniform force of$$\left( {3\widehat i + \widehat j} \right)$$newton acts on a particle of mass 2 kg. Hence the parti... NEET 2013 A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 m s$$-$$1. It collides with a horizonta... AIPMT 2012 Prelims Two spheres A and B of masses m1 and m2 respectively collide. A is at rest initially and B is moving with velocity v alo... AIPMT 2012 Prelims The potential energy of a particle in a force field is$$U = {A \over {{r^2}}} - {B \over r}$$where A and B are positiv... AIPMT 2012 Prelims A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant mag... AIPMT 2012 Mains A mass m moving horizontally (along the x-axis) with velocity$$v$$collides and sticks to a mass of 3m moving verticall... AIPMT 2011 Mains A particle of mass m is released from rest and follows a parabolic path as shown. Assuming that the displacement of the ... AIPMT 2011 Prelims A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The p... AIPMT 2011 Prelims Force F on a particle moving in a straight line varies with distance d as shown in figure. The work done on the partic... AIPMT 2011 Prelims The potential energy of a system increases if work is done AIPMT 2011 Prelims A particle of mass M, starting from rest, undergoes uniform acceleration. If the speed acquired in time T is V, the powe... AIPMT 2010 Mains An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mas... AIPMT 2010 Prelims A ball moving with velocity 2 m/s collides head on with another stationary ball of double the mass. If the coefficient o... AIPMT 2010 Prelims An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit le... AIPMT 2009 A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force con... AIPMT 2009 An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first pa... AIPMT 2009 A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 1... AIPMT 2009 A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial ... AIPMT 2008 Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 1... AIPMT 2008 A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of ... AIPMT 2007 The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential ener... AIPMT 2006 A body of mass 3 kg is under a constant force which causes a displacement s in metres in it, given by the relation s = ... AIPMT 2006 300 J of work is done in sliding a 2 kg block up an inclined plane of height 10 m. Work done against friction is (Take g... AIPMT 2006 A force F acting on an object varies with distance x as shown here. The force is in N and x in m. The work done by the... AIPMT 2005 A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 m s$$-$... AIPMT 2005 A mass of 0.5 kg moving with a speed of 1.5 m/s on horizontal smooth surface, collides with a nearly weightless spring o... AIPMT 2004 A particle of mass m1 is moving with a velocity v1 and another particle of mass m2 is moving with a velocity v2. Both ... AIPMT 2004 A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet ball building. After a fall of 30 feet ... AIPMT 2004 A stationary particle explodes into two particles of masses m1 and m2 which move in opposite directions with velocities ... AIPMT 2003 When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential e... AIPMT 2003 If kinetic energy of a body is increased by 300% then percentage change in momentum will be AIPMT 2002 Two springs A and B having spring constant KA and KB (KA = 2KB) are stretched by applying force of equal magnitude. If e... AIPMT 2001 A particle is projected making an angle of 45o with horizontal having kinetic energy K. The kinetic energy at highest po... AIPMT 2001 A child is sitting on a swing. Its minimum and maximum heights from the ground 0.75 m and 2 m respectively, its maximum ... AIPMT 2001 A mass of 1 kg is thrown up with a velocity of 100 m/s. After 5 seconds, it explodes into two parts. One part of mass 40... AIPMT 2000 If $$\overrightarrow F = \left( {60\widehat i + 15\widehat j - 3\widehat k} \right)$$ N and$\$\overrightarrow v = \lef...
AIPMT 2000

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