4. A snowball is thrown across the park at a velocity of 33m/s (right). It hits a tree and comes to a stop in 7 s.

A. What is the acceleration of the snowball? (2 marks)

b. Calculate the kinetic energy of this snowball at the moment it is thrown, if it has a mass of 0.04kg. (2 marks)

c. What is the gravitational potential energy of the snowball if the snowball hits the tree 1.5m above the ground? (2 marks)