Elwin is standing 50.0m from a large bell. he throws a rock at the bell and hears the sound of the bell 4.50s later. if the speed of sound is 330m/s, what was the speed of the rock?

Time taken by the sound to come from bell to Elwin

here we know that

d = 50 m

v = 330 m/s

now from above equation we have

now since we know that total time taken to hear the sound is 4.50s

so here we will have time to reach the rock to the bell is

now we know that distance of the bell is 50 m

so speed of the rock is given as

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !