A science student is riding on a flatcar of a train traveling along a straight h

Question

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of v1. The student throws a ball along a path that she judges to make an initial angle of with the horizontal and to be in line with the track.

The student’s professor, who is standing on the ground nearby, observes the ball to rise vertically.

How high does the ball rise?

the answer choices are in the image attached

Explanation / Answer

V1 = horizontal componet = V cos ( V = Initial velocity)

V = V1/ cos

Vy = V sin = ( V1/ cos) ( sin ) = V1 tan

max height = ( V1 tan ) ^2/ 2g = V1^2 tan^2 / 2g --------option 7

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