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Work, Energy and Power Test - 22
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Work, Energy and Power Test - 22
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  • Question 1/10
    4 / -1
    Two solid rubber balls A and B having masses 200 & 400 gm respectively are moving in opposite direction with velocity of A equal to 0.3 m/sec. After collision, the two balls come to rest when the velocity of B is :
    Solutions

  • Question 2/10
    4 / -1
    A neutron travelling with a velocity v and K.E ‘E’ collides perfectly elastically head on with nucleus of an atom of mass number A at rest. The fraction of total energy retained by the neutron is :
    Solutions

  • Question 3/10
    4 / -1
    A shell initially at rest explodes into two pieces of equal mass, the two pieces will :
  • Question 4/10
    4 / -1
    If water falls from a dam into a turbine wheel 19.6 m below then velocity of water at turbine, is (Take g = 9.8 m/s2)
    Solutions

  • Question 5/10
    4 / -1
    A bomb of mass 1 kg is thrown vertically upwards with a speed of 100 m/s. After 5 seconds, it explodes into two fragments. One fragment of mass 400 gram is found to go down with a speed of 25 m/s. what will happen to the second fragment just after the explosion? (g = 10 m /s2)
    Solutions

  • Question 6/10
    4 / -1
    A spring of force constant 800 N/m has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is
    Solutions

  • Question 7/10
    4 / -1
    A ball whose K.E. is E is projected at an angle of 450 to the horizontal.The kinetic energy of the ball at the highest point of its flight will be
    Solutions

  • Question 8/10
    4 / -1
    The kinetic energy K of a particle moving in a straight line depends on the distance s as K = as2. The force acting on the particle is
  • Question 9/10
    4 / -1
    A bullet is fired normally on a wooden plank, which is immovable. It loses 25% of its momentum in penetrating a thickness of 3.5 cm the total thickness penetrated by the bullet is
    Solutions

  • Question 10/10
    4 / -1
    A tennis ball falls freely from a height H on to an inclined smooth plane making an angle of 450 with horizontal. After bouncing, the ball falls on the plane again. The distance between the two points where the ball strikes the plane is
    Solutions

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