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A horizontal plank has a rectangular blo...

A horizontal plank has a rectangular block placed on it. The plank starts oscillating vertically and simple harmonically with an amplitude of 40 cm. The block just loses contact with the plank when the latter is at momentary rest Then.

A

the period of oscillation is `((2pi)/(5))`

B

the block weights its true weight `0.5` times its weight on the plank halfway up

C

the block weight double weights `1.5` time its weight on the plank halfway down

D

The block weight on the plank when the letter moves fastest

Text Solution

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The correct Answer is:
A, B, C, D
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