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Work Power and Energy

23 questions · Physics · JEE Advanced
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Work Power and Energy

23 questions · Physics · JEE Advanced

  1. A student skates up a ramp that makes an angle 30 ∘ with the horizontal. He/she starts (as shown in the figure) at the bottom of the ramp with speed v0 and wants to turn around over a semicircular path xyz of radius R during which… Includes diagram2020 · Shift 2 · Q44 · Multiple correct
  2. A particle is moved along a path AB-BC-CD-DE-EF-FA, as shown in figure, in presence of a force F=(αyi+2αxj​) N, where x and y are in meter and α=− 1 Nm-1. The work done on the particle by this… Includes diagram2019 · Shift 1 · Q53 · Numerical
  3. A small particle of mass m moving inside a heavy, hollow and straight tube along the tube axis undergoes elastic collision at two ends. The tube has no friction and it is closed at one end by a flat surface while the other end is fitted… Includes diagram2019 · Shift 2 · Q38 · Multiple correct
  4. A spring-block system is resting on a frictionless floor as shown in the figure. The spring constant is 2.0Nm−1 and the mass of the block is 2.0kg. Ignore the mass of the spring. Initially the spring is an unstretched… Includes diagram2018 · Shift 1 · Q43 · Numerical
  5. In the List-I below, four different paths of a particle are given as functions of time. In these functions, α and β are positive constants of appropriate dimensions and αeβ In each case, the force acting… Includes table2018 · Shift 2 · Q53 · MCQ
  6. A particle of mass m is initially at rest at the origin. It is subjected to a force and starts moving along the x-axis. Its kinetic energy K changes with time as dK/dt=γt, where γ is a positive constant of…2018 · Shift 2 · Q54 · Multiple correct
  7. A flat plate is moving normal to its plane through a gas under the reaction of a constant force F. The gas is kept at a very low pressure. The speed of the plate v is much less than the average speed u of the gas molecules. Which of…2017 · Shift 1 · Q39 · Multiple correct
  8. A particle of unit mass is moving along the x-axis under the influence of a force and its total energy is conserved. Four possible forms of the potential energy of the particle are given in Column I (a and U0 are constants). Match the… Includes diagram2015 · Shift 1 · Q60 · MCQ
  9. Consider an elliptically shaped rail PQ in the vertical plane with OP = 3 m and OQ = 4 m. A block of mass 1 kg is pulled along the rail from P to Q with a force of 18 N, which is always parallel to line PQ (see the figure given). Assuming… Includes diagram2014 · Shift 1 · Q44 · Numerical
  10. A tennis ball is dropped on a horizontal smooth surface. It bounces back to its original position after hitting the surface. The force on the ball during the collision is proportional to the length of compression of the ball. Which one of…2014 · Shift 2 · Q45 · MCQ
  11. The work done on a particle of mass m by a force K[(x2+y2)3/2x​i+(x2+y2)3/2y​j​](K being a constant of appropriate…2013 · Shift 1 · Q43 · MCQ
  12. A particle of mass 0.2 kg is moving in one dimension under a force that delivers a constant power 0.5 W to the particle. If the initial speed (in m/s) of the particle is zero, the speed (in m/s) after 5 s is2013 · Shift 1 · Q44 · Numerical
  13. A bob of mass m, suspended by a string of length l1 is given a minimum velocity required to complete a full circle in the vertical plane. At the highest point, it collides elastically with another bob of mass m suspended by a string of…2013 · Shift 1 · Q46 · Numerical
  14. A small block of mass 1 kg is released from rest at the top of a rough track. The track is circular arc of radius 40 m. The block slides along the track without toppling and a frictional force acts on it in the direction opposite to the… Includes diagram2013 · Shift 2 · Q44 · MCQ
  15. A small block of mass 1 kg is released from rest at the top of a rough track. The track is circular arc of radius 40 m. The block slides along the track without toppling and a frictional force acts on it in the direction opposite to the… Includes diagram2013 · Shift 2 · Q45 · MCQ
  16. A block of mass 0.18 kg is attached to a spring of force-constant 2 N/m. The coefficient of friction between the block and the floor is 0.1. Initially the block is at rest and the spring is un-stretched. An impulse is given to the block as… Includes diagram2011 · Shift 2 · Q49 · Numerical
  17. A thin ring of mass 2 kg and radius 0.5 m is rolling without on a horizontal plane with velocity 1 m/s. A small ball of mass 0.1 kg, moving with velocity 20 m/s in the opposite direction hits the ring at a height of 0.75 m and goes… Includes diagram2011 · Shift 2 · Q53 · Multiple correct
  18. A block of mass 2 kg is free to move along the x-axis. It is at rest and from t = 0 onwards, it is subjected to a time-dependent force F(t) in the x-direction. The force F(t) varies with t as shown in the figure. The kinetic energy of the… Includes diagram2010 · Shift 2 · Q47 · MCQ
  19. A light inextensible string that goes over a smooth fixed pulley as shown in the figure connects two blocks of masses 0.36 kg and 0.72 kg. Taking g = 10 m/s2, find the work done (in joules) by the string on the block of mass 0.36 kg during… Includes diagram2009 · Shift 2 · Q50 · Numerical
  20. Three objects A, B and C are kept in a straight line on a frictionless horizontal surface. These have masses m, 2m and m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B…2009 · Shift 2 · Q57 · Numerical
  21. A block (B) is attached to two unstretched springs S1 and S2 with spring constants k and 4k respectively (see figure I). The other ends are attached to identical supports M1 and M2 not attached to the walls. The springs and supports have… Includes diagram2008 · Shift 2 · Q49 · MCQ
  22. A bob of mass M is suspended by a massless string of length L. The horizontal velocity V at position A is just sufficient to make it reach the point B. The angle θ at which the speed of the bob is half of that at A, satisfies, Includes diagram2008 · Shift 2 · Q50 · MCQ
  23. Statement 1 : A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between the block and the surface after moving through a certain distance. The surface is now tilted to an angle of 30 ∘…2007 · Shift 1 · Q54 · MCQ