Question

PLEASE HELP ME IM DYING OF SOME KIND OF DISEASE OBTAINED BY HOMEWORK

Answer 1

a tennis ball is thrown upward from the ground with an initial velocity of 15 m/s

a) what is the maximum height attained by the ball?

Answer 2

hey, this is a 'projectile' question, so we will need to use the 'kinematic equations' there 3 of them.
deciding which 1 of the 3 equations to use depends on what we know from the information in the question.

So, listing the knowns from the information given we know:
initial velocity

we want to find
max height.

and generally we know that
velocity, when the ball is at it's peak, is equal to zero, in the 'y-direction' and
gravity is the same as acceleration, so we know that a = -9.81


from everything said, can you pick out which of the 3 kinematic equations to use?