Question

force acts on an object of mass 4 kg and change its velocity from 10 metre per second into 20 metre per second in 5 seconds find the magnitude of force​

Answer 1

F= m(v-u)/t= 4(20-10)/5=8N

Answer 2

F=mass x acceleration

F=mass x change is velocity

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Time

F=4 x(20-10)/5

F=4x10/5

F=4x2

F=8N