A large rectangular box ABCD falls vertically with an acceleration a.

1.	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) May be either (a), (b) or (c), depending on the speed of projection of P.
Answer» Correct Answer is: (a, b, & c) Superimpose 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 if a < g, the particle has a net downward acceleration.

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) May be either (a), (b) or (c), depending on the speed of projection of P.

Answer»

Correct Answer is: (a, b, & c)

Superimpose 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 if a < g, the particle has a net downward acceleration.

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