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Question

A car is travelling on a highway at a speed of 25 m/s along the x-axis. A passenger in a car throws a ball at an angle 37 with horizontal in a plane perpendicular the motion of the car. The ball is projected with a speed of 10 m/s relative to the car. What may be the initial velocity of the ball in unit vector notation?


A

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B

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C

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D

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Solution

The correct option is D


ux = 25^i as the car is moving with a speed of 25 ms along +ve axis, given θ = 37

uyuz = tan 37 = 34

the only possible option is 25 ^i + 6^j + 8^k.


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