Question

If a `5 kg` object is being constantly accelerated from `0m/s` to `12 m/s` over `16s`, how much power is being applied at `t= 1 s`?

Answer 1

45 J/s.

Explanation:

see this..

power = work / time

                          {where work = force * distance}

power = ( force * distance travelled ) / time

                          {where force = mass * [acceleration](https://socratic.org/physics/1d-motion/acceleration)}

power = ( (mass * acceleration) * distance travelled) / time

power = ( 5 kg * `12 m s^-1` / 16 s) * (16 s * 12 m/s) / 16 s

power = ( 3.75 ) * ( 192 ) / 16

power = 720 / 16

power = 45 J/s or 45 W

If object accelerates constantly than, the answer shows that 45 J ( Joule ) of energy is applied every second.