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A football is kicked with a speed of 22 m/s at an angle of 60o to the positive x direction taken along horizontal. At that instant, an observer moves past the football in a car that moves with a constant speed of 11 m/s in the positive x direction. Take +ve y direction vertically upwards. (g = 10 m/s2)

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The initial velocity of the ball relative to the observer in the car is 113 m/s in the +y direction

The initial velocity of the ball relative to the observer in the car is 17 m/s at 60o to the +x direction.

According to the observer in the car, the ball will follow a path that is straight up and down in the y direction.

According to the observer in the car, the ball will follow a straight line that is angled (less than 90o) with respect to the observer.

answer is A.

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Detailed Solution

w.r.t. to observer (Vx) football/observer = 11 - 11 = 0 So motion of the ball as seen from observer will be purely vertical with initial velocity 113 upwards.

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