Question

A stone is dropped from a height of 20m what will be its speed when it hits the ground ( g =10m / second square

Answer 1

Answer:

Let the initial velocity be u

Here , u=0

g=10 m/s²

v(final velocity)=v

h(height)=20 m

v²-u²=2gs

v²-0²=2×10×20

v²=400

v=√400

v=20 m/s.