Question

Define the Kinictec energy .write expression of Kinictec energy.A force of 12N acts on an object of mass of 4kg in the state of rest for 3s .Calculate the Kinictec energy acquired by the author 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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