If you drop a rock from a great height,about how fast will it be falling after 5 seconds,neglecting air resistance?
A)It depends on how heavy it is.
B)It depends on what shape it is.
C)10 m/s
D)15 m/s
E)50 m/s

Question

Quizplus · Accepted Answer

Without air resistance, the acceleration due to gravity is approximately 9.8 m/s^2. After 5 seconds, the speed would be $9.8 \, \text{m/s}^2 \times 5 \, \text{s} = 49 \, \text{m/s}$, which is closest to 50 m/s.

If You Drop a Rock from a Great Height,about How