Question

calculate the momentum of a ball of mass 450 grams moving with a speed of 120 km per hour

Answer 1

As we know the momentum (P) is the product of mass (m) and velocity (v)
P= m× v
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So here,
Mass of the ball = 450g

= (450/1000)kg

= 45/100kg

Velocity of the ball = 120 km per hour

=120 × 5/18 m/s
So,

Momentum of the Ball = mv

=(45/100)× 120 ×5/18 kg/(m/s^2)

=15 kg/(m/s^2)

Answer 2

Answer: Mass of the ball is 450 g

We know that 1 g = 1/1000kg

So, 450 g = 450/1000 kg

= 45/100kg

Speed of ball = 120km per hour

As we know that 1 kg per hour = 5/18 m/s

= 120*5/18

So momentum = mass * velocity

p=m*v

= 45/100*120*5/18

= 15m per second square

Explanation:

Momentum = mass * velocity