Asked by Anonymous

A pencil is rolled off a table of height 0.35 m. If it has a horizontal speed of 2.1 m/s, how long does it take the pencil to reach the ground?
Answered by Henry
h = Vo*t + 0.5g*t^2 = 0.35 m
0 + 4.9t^2 = 0.35
t^2 = 0.0714
t = 0.257 s.