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Physics
Find work done by friction for displacement ' S ' ?
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Q. Find work done by friction for displacement ' $S$ ' ?
Work, Energy and Power
A
$\mu_{ K }( mg + F \sin \theta) . S$
B
$-\mu_{ K }( mg + Fsin \theta) . S$
C
$\mu_{K}( mg - F \sin \theta) .S$
D
$-\mu_{ K }( mg - F \sin \theta) . S$
Solution:
$N = M q + F \sin \theta$
$\vec{ F }_{\text{Net }}=\mu_{ k }( mg + F \sin \theta)$
$=-\mu_{ k }( mg + F \sin \theta) S$
