Question

A particle of mass m collides with a stationary particle and continues to move at an angle of 45° with respect to the original direction. The second particle also recoils at an angle of 45° to this direction. The mass of the second particle is (collision is elastic)​

Answer 1

Answer:

Apply principle of conservation of momentum along x-direction,

mu=mv

1

cos45+Mv

2

cos45

mu=

2

1

(mv

1

+Mv

2

) ...(1)

along y−direction,

o=mv

1

sin45−Mv

2

sin45

o=(mv

1

−Mv

2

)

2

1

...(2)

Coefficient of e=1=

ucos45

v

2

−v

1

cos90

Restution

⇒

2

u

v

2

=1

⇒u=

2

v

2

...(3)

solving eqn (1), (2), & (3) we get

M=m

Answer 2

Let’s just go your Teacher and give ans