Q. A block is resting on a piston which is moving vertically with SHM of period 1.0 s. At what amplitude of motion will the block and piston separate?
A) 0.2 m
B) 0.25 m
C) 0.3 m
D) 0.35 m
Explanation
(b) Weight kept on the system will separate from the piston when the maximum force just exceeds the weight of the body. Hence, $m\omega^{2}y = mg$
or $y = \frac{g}{\omega^{2}} = 9.8/(2\pi)^{2} = 0.25$ m
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.