Question

If a `2 kg` object is constantly accelerated from `0m/s` to `18 m/s` over `5 s`, how much power musy be applied at `t= 4`?

Answer 1

If the accerelation is constant then so must be the force, as force=mass times acceleration (`F=m*a`).

Explanation:

Acceleration:
`a=(Deltav)/t=(18-0)/5=3.6m//s^2`

Force:
`F=m*a=2*3.6=7,2kg*m//s^2=7.2N`