Published by:
CGP EDU Academic Team
Published on: August 21, 2026
A system shown in figure is released from rest from unelongated state of spring. Pulley and spring are massless and friction is absent everywhere. The speed of 5 kg block when 2 kg block leaves the contact with ground is (take force constant of spring 
and 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Apply Conservation of Mechanical Energy:
Loss in GPE of 5 kg block 
Gain in KE of 5 kg block + Gain in Elastic PE of spring.
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