Q.
A car is moving towards east with a speed of 25km/h. To the driver of the car, a bus appears to move towards north with a speed of 253km/h . What is the actual velocity of the bus?
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a
50km/h, 300 east of north
b
50km/h, 300 north of east
c
25km/h, 300 east of north
d
25km/h, 300 north of east
answer is A.
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Detailed Solution
υ→c=25i^,υ→b/c=253j^ υ→b/c=V→b−V→c⇒V→b=V→b/c+V→c⇒υ→b=25i^+253j^|υ→b|=252+(253)2=50km/htanθ=25253=13⇒θ=300
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