Newton's three laws of motion, momentum, conservation of momentum, action-reaction pairs.
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Q1 · Force and Laws of Motion (Class 9) · EASY
A body of mass 5 kg is moving with a velocity of 8 m/s. What is the force required to bring it to rest in 4 seconds?
Q2 · Force and Laws of Motion (Class 9) · MEDIUM
A car moving with a velocity of 15 m/s comes to rest after applying brakes in 5 seconds. What is the retardation?
Q3 · Force and Laws of Motion (Class 9) · MEDIUM
A force of 20 N acts on a body of mass 5 kg which is at rest on a frictionless surface. What will be the velocity of the body after 3 seconds?