A 4 kg object possesses 18 J of kinetic energy. What is its velocity?

Answer: 3 m/s

Explanation:

Mass of object = 4kg

Velocity = ?

Kinetic energy = 18J

Recall that kinetic energy is the energy possessed by a moving object, and it depends on its mass M and velocity, V

Thus, Kinetic energy = 1/2 x mv^2

18J = 1/2 x 4kg x v^2

18J = 0.5 x 4kg x v^2

18J = 2kg x v^2

v^2 = 18/2

v^2 = 9

v = √9 (square root of 9)

v = 3 m/s

Thus, the velocity is 3m/s