A football is thrown at an angle of 30 degrees above the horizontal from a heigh

Question

A football is thrown at an angle of 30 degrees above the horizontal from a height of 2.00 m above the ground. Consider the following statements and indicate all that are correct:

a. The speed of the ball as it hits the ground is the same as when it was thrown.

b. The horizontal speed of the ball is constant.

c. The vertical component of the ball's velocity decreases linearly while it goes to the maximum height.

d. The acceleration of the bal at its maximum height is zero.

e. The maximum height the ball reaches does not depend on the speed at which it was thrown.

I know that b and c are correct, but I don't know if the others are. I need an explanation as to why they are correct. I originally picked b, c, d, e.

Explanation / Answer

b. The horizontal speed of the ball is constant.

c. The vertical component of the ball's velocity decreases linearly while it goes to the maximum height.

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