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 loose contact with the plank when the plank is at momentary rest. Then

A horizontal plank has a rectangular block placed on it. The plank sta

1.	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 loose contact with the plank when the plank is at momentary rest. Then
Answer» the period of oscillation is `((2pi)/(5))` the block weighs DOUBLE its weight, when the plank is at ONE of the positions of momentary rest. the block weighs 0.5 TIME its weight when the plank is half WAY up the block weighs 0.5 time its weight when the plank is halfway down Answer :A::B::C