A body is moving with the speed 20 mis on a mo
surface. If coefficient of friction is 0.5, then in
distance after which velocity becomes zero is
(1) 10 m
(2) 20 m
(3) 40 m
(4) 80 m
plz ans. fast
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2
Answer:
3) 40m
Explanation:
u= 20m/s, v = 0 m/s , s = ?
a = mu*g ( mu = coefficent of friction =0.5)
a = 0.5*10 = 5 m/s2
now apply the formula
v^2 = u^2 + 2as
(0)^2= (20)^2 + 2 *5*s
on solving s= 40 m
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