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A soccer player kicks a rock horizontally off a cliff 38.2m high into a pool of water. If the player hears the sound of the splash 3.13s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343m/s
What I don't understand here is, determining the horizontal displacement to determine the initial horizontal velocity.
1) I determine the time it take the rock to fall to the pool using Viy = 0.0 m/s and using
deltax= vit +1/2at^2
2) determine the time it takes for the sound to reach the ears by subtracting 3.13-2.792 (time for rock to fall) = 0.338 s
3) now i need to determine the horizontal displacement of the rock, Dont understand how to do that.
What I don't understand here is, determining the horizontal displacement to determine the initial horizontal velocity.
1) I determine the time it take the rock to fall to the pool using Viy = 0.0 m/s and using
deltax= vit +1/2at^2
2) determine the time it takes for the sound to reach the ears by subtracting 3.13-2.792 (time for rock to fall) = 0.338 s
3) now i need to determine the horizontal displacement of the rock, Dont understand how to do that.