A student watches a speedometer of the bus in which he is travelling. He observes that the speed of<br />the bus is 40 Km/h. This is the<br />(A) average speed of the bus<br />(B) instantaneous speed of the bus<br />(C) velocity of the bus<br />(D) average velocity of the bus<br />
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The flag is fluttering in the north-east direction. It shows that the wind is blowing toward the north-east direction. When the ship begins sailing toward the north, the flag will move along the direction of the relative velocity (v
wb
) of the wind with respect to the boat.
The angle between v
w
and v
b
=90+45
tanθ=
(72+51cos(90+45)
51sin(90+45)
Substituting and solving we get,
tanθ=
50.80
51
=1.0038
θ=tan
−1
(1.0038)=45.11
0
Angle with respect to the east direction = 45.11−45=0.11
Hence, the flag will flutter almost due east.
Explanation:
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