SAT - Science - Physics - Force

Question - 1

Momentum is a measure of

  • A mass
  • B quantity of motion
  • C Weight
  • D velocity

Question - 2

A body of mass M collides against a wall with velocity u and rebounds with the same speed. Its change in momentum

  • A -Mu
  • B zero
  • C 2Mu
  • D Mu

Question - 3

How much force is required to change the velocity of a body of mass 2 kg from 40 m/s to 50 m/s in 5 seconds?

  • A 4N
  • B 8N
  • C 10N
  • D 6N

Question - 4

If the momentum of the body is doubled, the kinetic energy becomes

  • A doubled
  • B remains same
  • C halved
  • D 4 times

Question - 5

A ball moving at a speed of 20 m/s is hit with an object so that its velocity becomes 25 m/s. If the mass of the ball is 150 gm, the impulse imparted to the ball is

  • A 0.75 Ns
  • B 2.5 Ns
  • C 1.5 Ns
  • D 0.5 Ns

Question - 6

For a body moving in a circular path with a constant speed, the velocity

  • A zero
  • B constant
  • C changes
  • D remains the same

Question - 7

The force acting on a mass of 1 gm due to the gravitational pull on the earth is called 1g wt one g wt equals

  • A 1N
  • B 980 dynes
  • C 9.8 N
  • D 98N

Question - 8

In a tug of war between the teams A and B. The rope breaks at a point which is nearer to A. Then

  • A A has applied more force
  • B B has applied more force
  • C A and B both have applied more force
  • D None has applied any force

Question - 9

A body is said to be under balanced forces when the resultant force acting on the body is

  • A zero
  • B unity
  • C infinity
  • D none of these

Question - 10

Internal forces are

  • A imbalanced force
  • B balanced force
  • C resultant force
  • D equilibriant force
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