Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Work Power and Energy question

2019 · 9 Jan · Shift 2 · Q70
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Work Power and Energy
  5. /2019 · 9 Jan · Shift 2 · Q70

Work Power and Energy question

2019 · 9 Jan · Shift 2 · Q70

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1
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 ?
  1. A
    850 J
  2. B
    950 J
  3. C
    875 J
  4. D
    900 J
PreviousNext

More from Work 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 - Includes diagram2019 · MCQ
  • A particle which is experiencing a force, given by F=3i−12j​, undergoes a displacement of d=4i particle had a kinetic energy of 3 J at the beginning of the…2019 · MCQ
  • Two particles of the same mass m are moving in circular orbits because of force, given by F(r)=r−16​−r3 The first particle is at a distance r = 1, and the second, at r = 4. The best estimate for the…2018 · MCQ
  • A body of mass m starts moving from rest along x-axis so that its velocity varies as υ=as​ 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…2018 · MCQ
  • A particle is moving in a circular path of radius a under the action of an attractive potential U=−2r2k​ Its total energy is:2018 · MCQ
  • 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 →∞ is :2017 · MCQ
  • 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:2017 · MCQ
  • 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 81​mv02​, the value of k will be:2017 · MCQ