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

2022 · 25 Jul · Shift 1 · Q44
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. /2022 · 25 Jul · Shift 1 · Q44

Work Power and Energy question

2022 · 25 Jul · Shift 1 · Q44

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1
A body of mass 0.5 kg0.5 \mathrm{~kg}0.5 kg travels on straight line path with velocity v=(3x2+4)m/sv=\left(3 x^{2}+4\right) \mathrm{m} / \mathrm{s}v=(3x2+4)m/s. The net workdone by the force during its displacement from x=0x=0x=0 to x=2 mx=2 \mathrm{~m}x=2 m is :
  1. A
    64 J
  2. B
    60 J
  3. C
    120 J
  4. D
    128 J
PreviousNext

More from Work Power and Energy

  • A bag of sand of mass 9.8 kg is suspended by a rope. A bullet of 200 g travelling with speed 10 ms − 1 gets embedded in it, then loss of kinetic energy will be :2022 · MCQ
  • A uniform chain of 6 m length is placed on a table such that a part of its length is hanging over the edge of the table. The system is at rest. The co-efficient of static friction between the chain and the surface of the table is 0.5, the…2022 · Numerical
  • A 0.5 kg block moving at a speed of 12 ms − 1 compresses a spring through a distance 30 cm when its speed is halved. The spring constant of the spring will be ​ Nm − 1.2022 · Numerical
  • As per the given figure, two blocks each of mass 250 g are connected to a spring of spring constant 2Nm−1. If both are given velocity v in opposite directions, then maximum elongation of the spring is : Includes diagram2022 · MCQ
  • Arrange the four graphs in descending order of total work done; where W1, W2, W3 and W4 are the work done corresponding to figure a, b, c and d respectively. Includes diagram2022 · MCQ
  • Sand is being dropped from a stationary dropper at a rate of 0.5kgs−1 on a conveyor belt moving with a velocity of 5 ms−1. The power needed to keep the belt moving with the same velocity will be :2022 · MCQ
  • A block of mass 'm' (as shown in figure) moving with kinetic energy E compresses a spring through a distance 25 cm when, its speed is halved. The value of spring constant of used spring will be nENm−1… Includes diagram2022 · Numerical
  • A bullet of mass 200 g having initial kinetic energy 90 J is shot inside a long swimming pool as shown in the figure. If it's kinetic energy reduces to 40 J within 1 s, the minimum length of… Includes diagram2022 · MCQ