Question

13. A coin is dropped from a 400 m high tower. What
is the coin's velocity when it hits the ground?
How long does it take to get there?​

Answer 1

Answer:

answer is it will take 9s to reach the ground and 88.2 m/s will be it's velocity when it touches the ground with g=9.8m/s^2

Explanation:

we know that ,

v=gt^2/2

400=9.8*t^2 /

t=√2*400/√9.8

t=9s

now,

we know that

vt=gt

so,

v=-9.8*9=-88.2m/s