An object of mass m is acted upon by a net force F and experiences an acceleration of a. The same object is then acted upon by a net force of ½ F. What is the resulting acceleration in terms of a? a. a
b. 2a
c. ½ a
d. ¼ a

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.