Question

Can someone please answer all parts?? Extra points for this one!

Answer 1

a)
Acceleration of stone = 10

Integrate:
So velocity = 10t

Integrate again:
So distance from starting point = 5t^2

Distance from ground = 450-5t^2

b)
450 - 5t^2 = 0


9.48 seconds

c) velocity = 10t

Put the time into this to give:

94.8 m/s

d.

Velocity = 10t + 5

Integrate again:

5t^2 + 5t


Solve
5t^2 + 5t = 450

Gives 9 seconds

Answer 2

The velocity is 0t, here's how I got this answer

To find Velocity you must do dv/dt, so in this case it would look like this:

DV/DT = -9.8 which also equals V = -9.8t + C so in this case the Velocity would be 0 because -9.8 - (-9.8) = 0