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Per NCERT Activity 7.1 (heavy ball dropped onto sand from different heights), how does the depression in sand change with the HEIGHT from which the ball is dropped?
AThe depression is shallower at greater height
BThe depression is unchanged regardless of height
CThe depression is DEEPER when the ball is dropped from a GREATER height (since the ball has more PE which converts to KE / depth on impact)
DThe ball does not make a depression at all
Answer & Solution
Correct answer: C. The depression is DEEPER when the ball is dropped from a GREATER height (since the ball has more PE which converts to KE / depth on impact)
Per NCERT Activity 7.1, higher drop = greater PE = greater KE at impact = deeper depression. The other options contradict observation.
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