I know that the pink highlited answer are not right, and the yellow one might be

Question

I know that the pink highlited answer are not right, and the yellow one might be right but can you help me to figure them out?

PLEASE answer both thanks

Topic 2 uestion 9 A ball is thrown into the air at some angle between 10 and 80 degrees. At the very top of the ball's path, its velocity is: A. entirely vertical. B. both vertical and horizontal. C. entirely horizontal. D. zero. E. Not enough information to tell. Topic 2, Question 10: You toss a ball across the field to a friend. When the ball reaches its maximum altitude, its acceleration A. changes sign B. is zero. C. is entirely horizontal D. is g/2. E. None of the above.

Explanation / Answer

You just need to think about you throwing a ball in the air. When you throw a ball, it’s only logical that at some point it stops and then comes back down to you. So, the velocity at the maximum height(the point where it turns around) is zero!

1) ANS:- D

Now, the acceleration ,Which is the force that tries to bring the ball back to you..and it’s the force that tries to keep you on the ground; it’s dear old gravity. we know that the gravitational acceleration is approximately 9.8m/s^2 and, it does not change. So, at maximum height, the acceleration is the gravitational acceleration! but it changes its sign...

2) ANS:- A

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