A car is traveling on a straight, level road under wintry conditions. Seeing a patch of ice ahead of her, the driver of the car
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Answer:
Explanation:
(a)Gravitational Force is W=mg
Frictional force is f
Normal force is N
(b)Since the block is in Equilibrium therefore from diagram we can see that
(c)Magnitude of Normal Force
(d)friction is also given by
and
thus
Sound level at distance of 15 m is given as 20 dB
so intensity at this distance is given as
now if we move closer to some some distance the sound level is now 50 dB
now the intensity is given as
now we know that
so now the distance from friend must be 47 cm