Force of 5N acts on a body of 5kg for 5 sec then the rate of change in momentum is
Correct answer: B. 50 N
- A. 25 N
- B. 50 N
- C. 5 N
- D. 125 N
Explanation
The rate of change of momentum is given by the formula Force×TimeForce×Time. Here, the force is 5N, and the time is 5 seconds. So, Force×Time=5N×5s=25Ns.Momentum is a vector quantity, and the rate of change of momentum is also a vector quantity. The correct unit for rate of change of momentum is Ns (Newton-second) or kg m/s.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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