1.

A small block of mass m and a concave mirror of radius R fitted with a stand, lie on a smooth horizontal table with a separation d between them. The mirror together with its stand has a mass m. The block is pushed at t = 0 towards the the mirror so that it starts moving towards the mirror at a constant speed V and collides with it. The collision is perfectly elastic. Find the velocity of the image (a) at a time t < dV (b) at a time t > d/V.

Answer»

`(-R^2 V)/([2(d-VT)-R]^2) . V (1+(R^2)/([2(Vt - d) -R]^2) )`
`(R^2 V)/([2(d+Vt)+R]^2) . V (1+(R^2)/([2(Vt - d) -R]^2) )`
`(-R^2 V)/([2(d-Vt)-R]^2) . V (1-(R^2)/([2(Vt - d) +R]^2) )`
`(-R^2 V)/([2(d-Vt)-R]^2) . V (1-(R^2)/([2(Vt + d) -R]^2) )`

ANSWER :A


Discussion

No Comment Found

Related InterviewSolutions