Charlie kicks a soccer ball up a small incline. On the way up,ball's acceleration has magnitude
jaj = 0:45 m/s2 and is directed in downhill direction. Charliekicks the ball at the bottom of the
incline and then immediately start to walk up the incline withconstant speed. Charlie performs
twi dierent trials.
a) In the first trial, Charlie kicks the ball with initial speed v0= 3:4 m/s. Charlie is 2.3-m behind
the ball when the ball is at the highest point. What is the speedvC of Charlie?
b) Charlie performs the second trial. He kicks the ball withunknown speed v00
but walks with the same speed vC as in the first trial. Charlie isnow 0.8 m behind the ball when the ball is at the
highest point. What is the initial speed v0 of the ball at thebottom of the hill? (Hint: You need to set-up a quadratic equationfor v0).
