PHYS 20-A rubber-band slingshot shoots a 25 g stone

PHYS 20-A rubber-band slingshot shoots a 25 g stone

A rubber-band slingshot shoots a 25 g stone. When answering 2a
below, remember that Ep = ½
kx2 and, because F = kx,
Ep = ½ Fx.

a. What is the
initial speed of the stone if the rubber band is drawn back
0.15 m with a
maximum force of 27 N?

b. How high will
the stone rise if it is shot straight upward?Show 

PHYS 20-A rubber-band slingshot shoots a 25 g stone
PHYS 20-A rubber-band slingshot shoots a 25 g stone