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Define Kinetic Energy. Write expression for Kinetic Energy.A force of 12N acts on anobject of mass of 4kg in the state of rest for 3s. Calculate the kinetic energy acquired by the object​

Answer»

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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