Question

plz ans this ,explain (ans is 800N/m)

Answer 1

ANSWER
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Potential Energy of the block = mgh

=> P.E. = 5 × 10 × 2

=> P.E. = 100 J

This Potential Energy changes into Potential Energy of Spring

Potential Energy of string = 1/2 × k × x
where k is Spring constant and x is length of compression

PE OF SPRING = PE OF BLOCK

PE OF SPRING = 100 J

=> 1/2 × k × (0.5)^2 = 100

=> 1/ 2 × k × 1/4 = 100

=> k = 100 × 2 × 4

=> k = 800 N/m

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HOPE IT HELPS ^_^