One half second after starting from rest, a freely-falling object will have a speed of about
A) 2.5 m/s.
B) 5 m/s.
C) 10 m/s.
D) 20 m/s.
E) none of these

Question

Quizplus · Accepted Answer

The acceleration due to gravity is approximately 9.8 m/s^2. In one half second, the speed v can be calculated using the formula v = g*t, where g is the acceleration due to gravity and t is the time. Thus, v = 9.8 m/s^2 * 0.5 s = 4.9 m/s, which is approximately 5 m/s.

One Half Second After Starting from Rest, a Freely-Falling Object