Question

a 0.1 kg ball moving at a speed of 5m/s in +x direction collides head on with 0.3kg ball that is at rest. Assuming that collision is elastic, determine the final velocities of the two balls​

Answer 1

Answer:

Since collision is elastic relative velocity of approach  

= relative velocity of separation  

n  

1

​  

=v  

1

​  

/3+u  

2

​  

 

u  

2

​  

=2v  

1

​  

/3

Conserving momentum  

m  

1

​  

v  

1

​  

=−m  

1

​  

 

3

v  

1

​  

 

​  

+m  

2

​  

v  

1

​  

/3

0.1  

3

4v  

1

​  

 

​  

=m  

2

​  

2v  

1

​  

/3

m  

2

​  

=0.2 kg

Explanation: