Question

a force of 12N acts on an object of mass 4kg in the state of rest for 3s calculate the kinetic energy acquired by the object​

Answer 1

Given that,

Force = 12N

Mass = 4kg

Time = 3s

Velocity = ?

Kinetic Energy = ?

Let's calculate velocity,

F = ma { a = v/t }

F = mv/t

12 = 4×v/3

v = 9 m/s

Let's calculate Kinetic energy = 1/2mv^2

1/2×4×9×9

162 J.

Therefore, the Kinetic energy is 162 J.

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