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A vertical spring with force constant k ...

A vertical spring with force constant `k` is fixed on a table. A ball of mass `m` at a height `h` above the free upper end of the spring falls vertically on the spring, so that the spring is compressed by a distance `d`. The net work done in the process is

A

`mg(h+d)+1/2Kd^2`

B

`mg(h+d)-1/2Kd^2`

C

`mg(h-d)-1/2Kd^2`

D

`mg(h-d)+1/2Kd^2`

Text Solution

Verified by Experts

The correct Answer is:
B
Energy is conserved –
`mg (h+d) =1/2 kd^2`
`W_("net") = mg (h+d) -1/2 kd^2 =0`
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