Question

the linear momentum of a ball of mass 50g is 0.5kg m/s . find its velocity

Answer 1

Mass of the ball is 50g = 0.05 kg
Momentum = 0.5 kg m/s

As, Momentum = mass x velocity
       Velocity = Momentum / mass
                    = 0.5 kg mps / 0.05 kg
                    = 10 m/s

Therefore, Velocity of the ball = 10 m/s

Answer 2

Mass of body is 50g and it's momentum is 0.5 kg m/s

As you can see both the values are having different unit so we will make them in the same unit of that we will devide 50g by 1000

We get 0.05kg mass

Now we know that

p= mv

0.5=0.05*v

v= 0.5/0.05

v= 10 m/s