Force and Laws of Motion

Class 9 · Science

80 questions33 easy29 medium18 hard

Sample Questions

Q1.When a carpet is beaten with a stick, dust comes out because of:

  • AGravity
  • BFriction
  • CInertia of dust particles
  • DElasticity of carpet

Q2.The momentum of an object of mass m moving with velocity v is:

  • A(mv)²
  • Bmv²
  • C½mv²
  • Dmv

Q3.A bullet of 10 g at 150 m/s stops in 0.03 s in a wooden block. The force exerted on the bullet is:

  • A50 N
  • B500 N
  • C5 N
  • D5000 N

Q4.Newton's second law of motion states that the rate of change of momentum is proportional to the:

  • AMass of the object
  • BVelocity of the object
  • CApplied unbalanced force
  • DFriction force

Q5.Balanced forces on an object result in:

  • AChange in speed
  • BNo change in the state of rest or motion
  • CChange in direction
  • DAcceleration

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Action and ReactionBalanced and Unbalanced ForcesConservation of MomentumFirst Law of Motion (Law of Inertia)Force and AccelerationFrictionInertia and MassMomentumSecond Law of MotionThird Law of Motion

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