A 4kg object has 180 J of kinetic energy. How fast is it moving?

Answer:9.5m/s

Explanation:

mass=m=4kg

Kinetic energy=ke=180J

Velocity=v

Ke=0.5 x m x v^2

180=0.5 x 4 x v^2

180=2 x v^2

Divide both sides by 2

180/2 = (2 x v^2) / 2

90=v^2

v^2=90

Take square root of both sides

√ (v^2) = √ (90)

v=9.5 m/s

velocity = 9.5 m/s