Respuesta :

Chelboy

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