Class IX

The acceleration produced in a boby by an acting force of given magnitude depends upon .
  1. Size of the body
  2. Mass of the body
  3. Shape of the body
  4. All of this
A passenger in a moving train tosses a coin which falls
  1. In front of him
  2. Falls outside the train
  3. Behind him
  4. Will not move
A body of weing W is suspended from the ceiling of a room through a rope of weight R. the ceiling pulls the rope by a force of
  1. W
  2. R
  3. W + R
  4. (W +R ) /2
Rocket works on the principle of conservation of
  1. Mass
  2. Energy
  3. Momentum
  4. Velocity
Acceleration acts always in the direction
  1. of the displacement
  2. of the initial velocity
  3. of the net force
  4. of the final velocity
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