Question

3 A ball of mass 0.5 kg has 100 J of kinetic energy. What is the speed of the ball? 100​

Answer 1

K.e=100j

mass=0.5 kg

sp=?

now,

k.e=1/2mv²

or, 100=1/2 x 0.5 x v²

or, 100/2= 0.5 x v²

or, 50 x 0.5 = v²

or, 25=v²

or, √25= v

:- v = 5 m/s

speee= 5 m/s