Question

I couldn't answer this question may someone please help me

Answer 1

Distance (s) =20 m

Initial velocity =0 m/s

g=10 m/s²

By using the formula:

v²= u²+ 2as

v²=0²+ 2×10×15

v²= 300

V= 10root over 3

$10 \sqrt{3}$

For calculating time,

v= u+ at

10 root over 3 = 0+ 10t

10 root over= 10t

t = 1 root over 3

t = 1.73 s

$1 \sqrt{3}$

The the stone will hit the ground with a velocity of 10 root over 3 m/s in 1 root over 3 sec.