A large rectangular box ABCD falls vertically with an acceleration ‘a’. A toy gun fixed at ‘A’ and aimed towards C fires a particle P
(a) P will hit C if !!a=g!!
(b) P will hit the roof BC if !!a>g!!
(c) P will hit the wall CD or the floor AD if !!a< g!!
(d) Can’t say
Super impose an upward acceleration 'a' on the system. The box becomes stationary. The particle has an upward acceleration 'a' and a downward acceleration 'g'.
If !!a=g!!, the particle has no acceleration and will hit 'C'.
If !!a>g!!, the particle has a net upward acceleration and will hit the roof BC.
If !!a< g!!,the particle has net downward acceleration nad will hit the wall CD or the floor AD.
Therefore, options (a),(b) and (c) are correct.