A body is moving in a room with a velocity of 20 m / s perpendicular t – McqOptions

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1.	A body is moving in a room with a velocity of 20 m / s perpendicular to the two walls separated by 5 meters. There is no friction and the collisions with the walls are elastic. The motion of the body is [MP PMT 1999]
A.	Not periodic
B.	Periodic but not simple harmonic
C.	Periodic and simple harmonic
D.	Periodic with variable time period
Answer» C. Periodic and simple harmonic

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