Question

The balls in the image above have different masses and speeds. Fill in the blanks in the following sentence: Ball ___ has the greatest amount of momentum and ball ___ has the least amount of momentum.

Answer 1

Explanation:

The given figure shows four balls A,B,C and D. Momentum of an object is defined as the product of its mass and velocity.

Momentum of ball A, p₁ = m₁v₁ = 0.7 kg × 15 m/s = 10.5 kg-m/s

Momentum of ball B, p₂ = m₂v₂ = 5.5 kg × 1.2 m/s = 6.6 kg-m/s  

Momentum of ball C, p₃ = m₃v₃ = 5 kg × 2.5 m/s = 12.5 kg-m/s    

Momentum of ball D, p₄ = m₄v₄ = 1.5 kg × 5 m/s = 7.5 kg-m/s

So, ball C has the greatest amount of momentum and ball B has the least amount of momentum.      

Answer 2

Ball C has the greatest momentum and ball B has the least amount of momentum.