Question

What force will change the velocity of a body of mass 4 Kg from 20 m/s to 30 m/s in 2 s?​

Answer 1

Answer:

Given that,

Mass=4kg

Initial velocity (v)=30 m/s

Final velocity (u)=20m/s

time=2s

F=ma

So first we have to find the acceleration

and we know that a=(v-u)/t

a=(30-20)/2

a=10/2

a=5

So now we can easily find Force

F=ma

F=4*5

F=20N

This is the correct answer

Hope this help you

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Explanation: