Question

The spring extends by x on loading, then energy stored by the spring is :

(if T is the tension in spring and k is spring constant)

• A. $\frac { T ^ { 2 } } { 2 k }$
• B. $\frac { T ^ { 2 } } { 2 k ^ { 2 } }$
• C. $\frac { 2 k } { T ^ { 2 } }$
• D. $\frac { 2 T ^ { 2 } } { k }$

Answer 1

Answer: (A)

$\frac { T ^ { 2 } } { 2 k }$

Answer 2

$U = \frac { F ^ { 2 } } { 2 k } = \frac { T ^ { 2 } } { 2 k }$