A block is placed on a horizontal plank. The plank is performing … - Vidyadip

MCQ

A block is placed on a horizontal plank. The plank is performing $SHM$ along a vertical line with amplitude of $40\,cm.$ The block just loses contact with the plank when the plank is momentarily at rest. Then :

A
the period of its oscillations is $2\pi /5 \,sec.$
B
the block weights on the plank double its weight, when the plank is at one of the positions of momentary rest.
C
the block weights $1.5$ times its weight on the plank halfway down from the mean position.
✓
all of the above

✓

Answer

Correct option: D.

all of the above

d

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