Mr. Maher is standing 50 m from A large bell with his throwing arm he throws the rock at the bell and he hears the sound 4.5 s later. If the speed of sound is 330 m/s what was the speed of the rock in the air The answer is 11.5
To solve this problem, we need to first calculate the time it took for the rock to reach the bell. We know that the total time taken is 4.5 seconds, and since the speed of sound is 330 m/s, the time taken for the sound to reach Mr. Maher is 50/330 = 0.15 seconds.
Therefore, the time taken for the rock to reach the bell is 4.5 - 0.15 = 4.35 seconds.
Now, using the equation:
Distance = Speed x Time
We can calculate the speed of the rock as follows:
50 = Speed x 4.35
Speed = 50 / 4.35 = 11.5 m/s
Therefore, the speed of the rock in the air was 11.5 m/s.