Answer:
The acceleration of the plastic balls is not uniform.
Explanation:
A student 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 9.80 m/s2 but finds the measured time to be 35% greater. What is the most likely cause of the large percent error?
from the kinematic equation
s=ut+[tex]\frac{1}{2} *at^{2}[/tex]
s=3m
a=9.8m/s^2
t=?
substituting into the equation
3=0*t+0.5*9.8t^2
t^2=.6122
t=0.782secs
if it is found to be 35% greater , then it will be
1.35*0.782
1.056s
the only casue would have been that
the downward acceleration of the ball is not uniform
