Question

A 2kg block drop vertically from a hright of 40 cm on a spring whose spring constant is 1960n/m.calculate spring constant

Answer 1

✔️✔️ ANSWER ✔️✔️

All the energy

= 2.g.h

= 2×9.8×0.4

= 7.84 J

is transferred to the spring in its instant of max. compression. 

Energy stored in a spring

= ½.k.x²

= 7.84 J. 

Therefore

extension x = √[7.84×2/k]

= √[15.68/2000]

= 0.0885 m

= 8.85 cm.

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