(a) An object of mass 3.2 kg is thrown straight up with an initial speed of 7.0 m/s from a height of 10 m.  How fast is the object moving as  it hits the ground?  (b) How does the answer to part (a) above change if the object is thrown with the same initial speed but at a 30^o angle above the horizontal?

Answer:  (a) 16 m/s