Question

If the splash is heard 1.07 seconds later, what was the initial speed of the rock? take the speed of sound in the air to be 343 m/s.

Answer 1

The initial speed of the rock was 9.00m deep.

What is initial speed?

Speed is a scalar quantity that measures the velocity's magnitude (meaning it only takes one number to describe it, unlike a vector which takes at least two, one for the magnitude and one for the direction). Initial speed is a common misnomer for initial velocity, although velocity is more accurate because it denotes the magnitude of a vector, which has direction. On the other hand, as speed is a scalar value, it does not convey direction. Initial speed is a common misnomer for initial velocity, although velocity is more accurate because it denotes the magnitude of a vector, which has direction. On the other hand, as speed is a scalar value, it does not convey direction.

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