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A block attached with a spring is released from A. Position-B is the mean position and the block moves to point C. Match the following two columns.
Column-I Column-II
A From A to B decrease in gravitational potential energy is……the increase in spring potential energy. P less than
B From A to B increase in kinetic energy of block is……the decrease in gravitational potential energy. Q more than
C From B to C decrease in kinetic energy of block is…..the increase in spring potential energy. R equal to
D From B to C decrease in gravitational potential energy is……the increase in spring potential energy. S can’t say

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$A - Q, B - P, C - Q, D - P$

$A - P, B - Q, C - Q, D - P$

$A - Q, B - P, C - P, D - P$

$A - P, B - P, C - P, D - P$

answer is C.

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Detailed Solution

Law of conservation of energy is used here.

From A to B spring potential energy increases and block's kinetic energy also increases which is due to decrease in gravitational potential energy therefore, decrease in gravitational potential energy is more than increase in spring potential energy. Similarly increase in kinetic energy is less than decrease in gravitational potential energy

B to C gravitational potential energy and KE decreases and spring potential energy increases
therefore, rise in spring potential energy is more than both decrease in KE and decrease gravitational potential energy.

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