Question

A ball is dropped from a height h when it reaches the ground its velocity is 40m/s

Answer 1

${v}^{2} - {u}^{2} = 2as$

${40}^{2} - {0}^{2} = 2 \times 10 \times s$

1600-0=20*s

s=80

Answer 2

Answer:

80m

Explanation:

v=sqrt2gh

solving we get h=80m

hope it helps