Question

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 />​

Answer 1

Answer:

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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