5.Work, Energy, Power and Collision
easy

જયારે સ્પિંગ્રને $1\,cm$ ખેંચતાં $U$ ઊર્જાનો સંગ્રહ થાય છે.હવે,તેને $4 cm$ ખેંચતા ઊર્જાનો સંગ્રહ કેટલો થાય?

A

$4U$

B

$8U$

C

$16 U$

D

$2U$

Solution

(c)Potential energy $U = \frac{1}{2}k{x^2}$

$U \propto {x^2}$ [if k = constant]

If elongation made $4 $ times then potential energy will become $16$  times.

Standard 11
Physics

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