- Home
- Standard 11
- Physics
8.Mechanical Properties of Solids
medium
A wire is suspended by one end. At the other end a weight equivalent to $20\, N$ force is applied. If the increase in length is $1.0\, mm$, the increase in energy of the wire will be ....... $joule$
A
$0.01$
B
$0.02$
C
$0.04$
D
$1.00$
Solution
(a) Increase in energy $ = \frac{1}{2} \times 20 \times 1 \times {10^{ – 3}} = 0.01J$
Standard 11
Physics