Home
Class 12
PHYSICS
A ball A of mass M collides elastically ...

A ball A of mass M collides elastically with a similar ball B at rest as shown in figure. Initially velocity of ball A is u m/s. After collision,

A

Speed of ball B is u `sin theta`

B

Velocity of ball A is `u sin^2 theta hati + u sin theta cos theta hatj`

C

Speed of ball A is `u cos theta`

D

`Velocity of ball B is `u cos theta sin theta hati + u cos^2 theta hatj`

Text Solution

Verified by Experts

The correct Answer is:
B
`implies barV_A = u sin theta(sin theta hati + cos theta hatj) = u sin^2 theta hati + u sin theta cos theta hatj`
`barV_(B) = u cos theta(cos theta hati - sin theta) = u cos^2 theta hati - u sin theta cos theta hatj`
.
Promotional Banner

Similar Questions

Explore conceptually related problems

A ball of mass m_(1) , collides elastically and head on with ball of mass m_(2) at rest. Then

A small ball of mass m collides elastically with a simple pendulum with bob of mass ma at rest. The macimum height attained by the bob after collision is

A solid spherical ball rolling without slipping collides elastically with an identical ball at rest, as shown in the figure. Assuming that the frictional forces are small enough to have negligible effect during the instant of collision, calculate, the velocity of each ball along enough time after the collision when each ball is again rolling without slipping.

A ball of mass m moving with velocity v collides head on elastically with another identical ball moving with velocity - V. After collision

A ball of mass m is attached to the lower end of a vertical string whose upper end is fixed. An identcial ball 'B' moving with a velocity v_(0) = 6 m//s at an angle theta = 45^(@) from vertical collides elastically with the ball 'A' as shown. The verocity of the ball 'B' just after collision is

A ball of mass 1kg moving with 4m^-1 along +x-axis collides elastically with an another ball of mass 2kg moving with 6m//s is opposite direction. Find their velocities after collision.

A stick of length L and mass M lies on a frictionless horizontal surface on which it is free to move in any way. A ball of mass m moving with speed v collides elastically with the stick as shown in the figure. If after the collision the ball comes to rest, then what would be the mass of the ball?