Question

A stuntman jumps from the roof of a building to a safety net below. How far has the stuntman fallen after 1.6 seconds?

Answer 1

I found `12.5m`

Explanation:

Here you can use the general relationship:
`y_f-y_i=v_it+1/2at^2`

where `i and f` refer to the initial and final positions: The initial position can be chosen as zero height and with your data, with `v_i=0` and using `g=-9.8m/s^2` (because directed downwards) we get:
`y_f-0=-1/2(9.8)*(1.6)^2`
`y_f=-12.5m` below the starting point at `y_i=0` considered at the origin.