NEET 2007 Physics question
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
Answer: (3)
Solution
The ball moves down a total distance before it momentarily stops (free fall through plus compression through ). Work done by gravity . Work done by the spring force (which opposes the downward motion) . Net work done in the
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