Home
Class 11
PHYSICS
There object A ,B and C are kept is a st...

There object `A ,B` and `C` are kept is a straing line a fritionlas horizental surface . These have masses have increase on `2m` and `m` repectively . The object `A` move toward `B` with a speed `9` m//s and makes as electic collision with a there after `B` makes complately inclesis with `C` . All motion over on the same strangth line . Find the first speed of the object `C`

Text Solution

Verified by Experts

The correct Answer is:
4

for collision betwee A & B
`m(9)+0=mV_(A)=2mV_(B)` (conservation of linear momentum)
`9=V_(A)+2V_(B)`
& `V_(sep)=V_(app)` (elastic collision)
`V_(B)-V_(A)=9-0`
`rArr" "V_(A)=-3m//s`
& `V_(B)=6m//s`
for collision between B & C
`6(2m)=(m+2m)V` (conservation of linear momentum)
`rArr" V=(12m)/(3m)=4m//s`
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS & MOMENTUM CONSERVATION

    BANSAL|Exercise EXERCISE-4 (SECTION-A) (Comprehension)|3 Videos

  • CENTRE OF MASS & MOMENTUM CONSERVATION

    BANSAL|Exercise EXERCISE-4 (SECTION-B) (JEE-ADVANCED Previous Year Questions)|8 Videos

  • CENTRE OF MASS & MOMENTUM CONSERVATION

    BANSAL|Exercise EXERCISE-3 (Miscellaneous Exercise)|30 Videos

  • GRAVITATION

    BANSAL|Exercise EXERCISE -4 Section - B|6 Videos

Similar Questions

Explore conceptually related problems

Three objects A , B and C are kept in a straight line on a smooth horizontal surface. These have masses m , 2m and 3 m , respectively . The head - on elastic collision takes place between A and B and then B makes completely inelastic collision with C . All motions occur on the same straight line. The final speed of C will be

Three masses A, B and C are kept on a smooth horizontal surface as shown in the fiugre. A sharp impulse is given to the mass A, so that it starts moving towards B with speed v_(0) . What is the minimum value of m so that there is only one collision between masses A and B (all collisions are elastic)

A ball moving with a speed of 9m//s strikes an identical ball at rest, such that after the collision, the direction of each ball makes an angle of 30^(@) with the original line of motion. Find the speeds of the two balls after collision.

A highly elastic ball moving at a speed of 3 m//s approaches a wall moving towards it with a speed of 3 m//s . After the collision. the speed of the ball will be

A ball moving with a speed of 9ms^(-1) strikes an identical ball such that after the collision the direction of each ball makes and angle 30^@ with the original line of motion. Find the speeds of the two balls after the collision.

Two particles A and B of equal size but of masses m kg and 2 m kg are moving directly towards each other with speeds 21 m/s and 4 m/s respectively. After collision, A moves with a speed of 1 m/s in the original direction. Then:

An object of mass m_(1) moving with speed v collides with another object of mass m_(2) at rest and stick to it. Find the impulse imparted to the second object.