Question

1 Two springs A and B are identical but A is harder than B (KA > KB). On which spring more
work will be done if (a) they are stretched by same distance.​

Answer 1

Answer:

k

A

>k

B

When stretched by same distance-

U=

2

1

kx

2

=W

⟹W

A

>W

B

since k

A

>k

B

When stretched by same force-

F=kx⟹x=

k

F

W=

2

1

kx

2

=

2k

F

2

⟹W∝

k

1

⟹W

A

′

<W

B

′

since k

A

>k

B