Question

A stone is dropped from a cliff . What will be its speed when it was fallen 100 m ?

Answer 1

kinematics equation
${v}^{2} = {u }^{2} + 2as \\ {v}^{2} = 0 + 2 \times 9.8 \times 100 \\ v = \sqrt{1960} \\ v = 14 \sqrt{10} m \: per \: s$
hope this helps you

Answer 2

the answer is

u=0

a=9.8

s=100

v²=u²+2as

v² = (0)²+2×9.8×100

v²= 1960

v=√1960

v=14√10 m/s

HOPE IT HELPS YOU