Question

A body of mass 10 kg is moving at 4 m/sec and is acted upon by a force of 20 n for 3 sec and stops

Answer 1

Explanation:

mass = 10kg, t = 4 m/sec

f = 20N, t = 3sec

I'll say for initial velocity..

f=ma..... 20=10 × a

so, a = 2m/sec^2

initial velocity, v = u + at

initial = u, final = 2u

2u= u + 2(4)

u= 8 m/sec.....

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