Question

a body of mass 1 kg fall freely from a height of hundred metre on a platform of mass 3kg which is mountain on spring having a spring constant K barabar 1.25 into 10 to the power 6 Newton per metre the body St to the platform and the springs maximum compression is found to be x then value of x will be close to

Answer 1

Acc. TO me,

I think your answer is 4 cm

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Use conservation of energy

Energy released                              =energy absorbed by spring

when fall from h height                      when ball fall height h

so body do work

work done by gravitat. potential Energy=work done to compress spring

1/2*K*x^2=mgh

1/2*1.25*10^6*x^2=1*10*100

If you solve then

x^2=1/625

x=1/25

x=0.04m

x=4cm

I hope you understand my answer

Answer 2

according to me, the answer should be 4cm