Question

A body of mass m falls from a height h onto a pan (of
negligible mass) of a spring balance as shown. The spring
also possesses negligible mass and has spring constant k.
Just after striking the pan, the body starts socillatory motion
in vertical directioin of amplitude A and energy E. Then
(a) A = mg/k
(b) A = mg/k √1 + 2kh/mg
(c) E = mgh + 1/2 kA²
(d) E = mgh + (2mg/2k)²

Answer 1

A body of mass m falls from a height h onto a pan (of

negligible mass) of a spring balance as shown. The spring

also possesses negligible mass and has spring constant k.

Just after striking the pan, the body starts socillatory motion

in vertical directioin of amplitude A and energy E. Then

(a) A = mg/k

(b) A = mg/k √1 + 2kh/mg

(c) E = mgh + 1/2 kA²

(d) E = mgh + (2mg/2k)²

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Answer 2

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