Question

when a mass m is attached to a spring it exerts a force

Answer 1

Answer:

We know that if spring is stretches by x then spring force is F=kx

Given

x=l

Therefore,

F=kl

Mg force will act downward

Now

Mg=kl

Potential energy stored in spring is

PE=

2

1

kl

2

=

2

1

×kl×l=

2

Mgl

Answer 2

Explanation:

We know that if spring is stretches by x then spring force is F=kx

Given

x=l

Therefore,

F=kl

Mg force will act downward

Now

Mg=kl

Potential energy stored in spring is

PE=

2

1

kl

2

=

2

1

×kl×l=

2

Mgl

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