Astudent is testing the kinematic equations for uniformly accelerated motion by measuring the time it takes for light-weight plastic balls to fall to the floor from a height of 3 m in the lab. the student predicts the time to fall using g as 9.8 m/s^2 but finds the measured time to be 35 % greater. which of the following is the most likely cause of the large percent error?

a) the acceleration due to gravity is 70% greater than 9.8m/s^2 at this location
b) the acceleration due to gravity is 70% less than 9.8 m/s^2 at this location
c) air resistance increases the downward acceleration
d) the acceleration of the plastic balls is not uniform
e)the plastic balls are not truelly spherical.