Math Help - Falling stone!

1. Hello!

A stone is thrown horizontally with an initial speed of 7.5 m/s from the edge of a cliff. A stopwatch measures the stone's trajectory time from the top pf the cliff to the bottom to be 2.5 s. What is the height of the cliff?

2. Originally Posted by babygirl
A stone is thrown horizontally with an initial speed of 7.5 m/s from the edge of a cliff. A stopwatch measures the stone's trajectory time from the top pf the cliff to the bottom to be 2.5 s. What is the height of the cliff?
$h=\frac{1}{2}gt^2$
Solving, h=31.25m(g=10m/s^2)

Malay

3. Hello, babygirl!

A stone is thrown horizontally with an initial speed of 7.5 m/s from the edge of a cliff.
This can be replaced with "A stone is dropped from the edge of a cliff."

A stopwatch measures the stone's trajectory time from the top of the cliff
. . to the bottom to be 2.5 s. .What is the height of the cliff?

A horizontal initial speed has no effect on the stone' descent.

Malay's solution is absolutely correct . . .