Question

A force of 3 N acts on a mass of 0.5 kg at rest for 10 s. Find the final velocity and the momentum of the body after 10 s?

Answer 1

When a body is at rest, its initial velocity is zero. The force F is 3 N that acts on mass M 0.5 Kg and the time t is 10 seconds.

As per the formula, F= ma, where ‘a’ is the acceleration.

Hence, 3 = 0.5 x a, a = 3 / 0.5 = 6 m/s2.

As acceleration is 6 m/s2, the final velocity V = u + at = 0 + 6 x 10 = 60 m/s.

The momentum is calculated as mv = 0.5 x 60 = 30 Kgm/s.

Answer 2

Answer:

30 km/s

Explanation:

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