Question

a ball of mass 5kg with velocity 15m/s undergoes head on collision with another ball of unknown madd at rest and after collision it rebounds with a velocity 5m/s . find yhe mass of the other ball ​

Answer 1

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Answer 2

Answer:

10 Kg

Explanation:

m1 = 5kg

u1 = 15m/s

v1 = -5m/s

u2 = 0

m2 = x

Formula: v1= [(m1-m2)/(m1+m2)]*u1

-5=[(5-x)/(5+x)]*15

-(5+x)=(5-x)*15/5

-5-x=(5-x)*3

-5-x=15-3x

3x-x=15+5

2x=20

x=10 Kg