PHYSICS QUESTION BRAINLIEST Ball A with a mass of 5 kg is moving at 20 m/s, collides with ball B of unknown
mass moving at 10 m/s in the same direction. After the collision, ball
A moves at 10 m/s and ball B at 15 m/s, both still in the same
direction. What is the mass of ball B?

M = mass of the ball A = 5.0 kg

m = mass of the ball B = ?

V = initial velocity of the ball A before collision = 20 m/s

v = initial velocity of the ball B  before collision = 10 m/s

V' = final velocity of the ball A after collision = 10 m/s

v' = final velocity of the ball B after collision = 15 m/s

using conservation of momentum

M V + m v = M V' + m v'

(5.0) (20) + m (10) = (5.0) (10) + m (15)

100 + 10 m= 50 + 15 m

5 m = 50

m= 10 m/s

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