posted by Matt on .
A rock thrown horizontally at a large bell 54.0 m away is heard to hit the bell 4.80 s later. If the speed of sound is 330 m/s, what was the speed (in meters/second) of the rock? (Disregard gravity.)
Let V be the rock horizontal velocity.
(Rock travel time) + (sound travel time) = total time delay = 4.80 s
54/V + 54/330 = 4.80
54/V = 4.636 seconds
Solve for V, in m/s