Question

An object is dropped from a tower of height 80 metre (intial velocity = 0). How much time it takes the object to the reach the ground and with what speed it reaches the ground? (Take a=10ms^ -2)​

Answer 1

Answer:

80/23=34

Explanation:

80|23002

tha,nk

Answer 2

Answer:

4s and 40m/s

Explanation:

s=80m

u=0m/s

g=10ms^-2(downwards)

=>80=ut + 1/2 gt^2

=>80=0×t + 1/2 × 10t^2

=>80=0 + 5t^2

=>t^2=80/5

=>t^2=16

=>t=√16

=>t=4s

v=u + gt

=0 + 10×4

=40m/s