Question

a body of mass 10kg is initially moving at 20 m/s what is the force required to stop it within 100 meters

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Answer 1

Answer: m=10 kg , u=20m/s , s= 100m , v=0 , F=?

t=s/u

t=100/20 = 5s

F=ma [a=acceleration]

a= (v-u)/t

a = (0-20)/5

a= -4 ms^-2

F = ma

= (10)(-4)

= -40N

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