Question

An a
body P moving with a velocity of 20km Sec collides with another body Q of same mass at rest.
uter collision the velocity of Qif P comes to rest after collosion is

Answer 1

Answer:By conservation of linear momentum

2v

0

​

=2(

4

v

0

​

​

)+mv⇒2v

0

​

=

2

v

0

​

​

+mv⇒

2

3v

0

​

​

=mv....(1)

since collision is elastic

v

separation

​

=v

apprach

​

⇒v−

4

v

0

​

​

=v

0

​

⇒

4

5v

0

​

​

=v....(2)

equating (2) and (1)

4

3v

0

​

​

=m(

4

5v

0

​

​

)⇒m=

5

6

​

=1.2kg

solution

Explanation: