Question

Three carts move on a frictionless track with masses and velocities as shown. The carts collide and stick together after successive collisions. Find the total magnitude of the impulse experience by `A`.
`m_(1)=3kg, m_(2)=1kg, m_(3)=2kg`
`v_(1)=1m//s, v_(2)=1m//s, v_(3)=2m//srarr+ve`

A. `1Ns`
B. `2Ns`
C. `3Ns`
D. `4Ns`

Answer 1

Correct Answer - B
Let final velocity of combined systesm is `V`, then apply conservation of linear momentum.
`3xx1+1xx1-2xx=6V`
`V=0`
impulse experienced by `A =` change in momentum of `A`
`J=3[0-1]=-3Ns`