MHT CET 2026 Physics question
A block of mass 'm' moving on a frictionless horizontal surface collides with a spring of spring constant 'K' and compresses it through a distance 'x'. The maximum momentum of the block after collision is
Answer: (B)
Solution
The surface is frictionless, so mechanical energy is conserved. At maximum compression the block is momentarily at rest and all its kinetic energy is stored in the spring: , so . The block is pushed back by the spring and leaves with this same speed
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