The diagram shown below illustrates the problem. v = vertical upward launch velocity. g = 9.8 m/s² is acceleration due to gravity.
When s = - 35m, the elapsed time is 4 s. Therefore (- 35 m) = (v m/s)*(4 s) - (1/2)*(9.8 m/s²)*(4 s)² -35 = 4v - 78.4 4v = 78.4 - 35 = 43.4 v = 10.85 m/s
Here yo = 35.0m Vo is unknown y final = 0 t = 4.00 s and I will approximate g to 10m/s^2
=> 0 = 35.0 + Vo * 4 - 5 * (4.00)^2 => Vo = [-35 + 5*16] / 4 = - 45 / 4 = -11.25 m/s
The negative sign is due to the fact that the initial velocity is upwards and we assumed that the direction downwards was positive when used g = 10m/s^2.
Acceleration stress, physiological changes that occur in the human body in motion as a result of rapid increase of speed. ... A force of 3 g, for example, is equivalent to an acceleration three times that of a body falling near Earth.
