projectile and work problem

[nikan_ange]

1. The problem statement, all variables and given/known data
a .50 kg ball thrown upward has an initial Kinetic energy of 80 J.


2. Relevant equations

(a)what are its kinetic and potential energy when it has traveled 3 quarters of the distance to its maximum height?
(b) speed at this point?
(c) potential energy at the maximum height (assume a reference is chosen to be zero at the launch point)?

3. The attempt at a solution
pls reply...i nid it badly...thnks...im working on it now..
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution

[dx]

Please show your attempt.

[nikan_ange]

i dont have an idea honestly

[dx]

Start by finding the maximum height. What is the kinetic energy at the maximum height?