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5.Work, Energy, Power and Collision
easy

$5 \times {10^3}N/m$ બળ અચળાંક ધરાવતી સ્પિંગ્રની લંબાઇ $ 5 cm$  થી  $10 cm$ વધારતાં થતું કાર્ય......$N-m$

A

$6.25 $

B

$12.50 $

C

$18.75 $

D

$25$

Solution

$W = \frac{1}{2}k(x_2^2 – x_1^2)$

$ = \frac{1}{2}5 \times {10^3}[{(10 \times {10^{ – 2}})^2} – {(5 \times {10^{ – 2}})^2}] = \frac{1}{2} \times 5 \times {10^3} \times 75 \times {10^{ – 4}} $

$= 18.75\,N.m$.

Standard 11
Physics

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