Question

Question #22e22

Answer 1

`h=y_i+v_i*t*sin alpha-1/2*g*t^2`

`y_i:"height of building"`

`v_i="initial velocity"`

`alpha="angle"`

`sin 25=0.423`

`t:"time"`

`g:9.81" "m/s^2`

`0=y_i+15*3*0.423-1/2*9.81*3^2`

`"we have written h=0 because object has fallen"`

`0=y_i+19.035-44.145`

`0=y_i-25.11`

`y_i=25.11 " "m`