Question

A body of mass 5 kg is at rest a force 20 n is applied on it .What is the ke of the body after 10 sec

Answer 1

Let's start

Force = mass × acceleration

A= F/m

a= 4 m/s ².

We know that,

K.e = 1/2 mv²

To find v:-

V= u+at

V= 0+40

V= 40 m/s. (thia is final velocity after 10 sec )

K.E = 1/2 ×5×40×40

K.E =4000 J.

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