-0 m/s
- average velocity=displacement/time
- the runners displacement is zero so her average velocity must be zero
Answer:
the Power required is 300 W
Explanation:
We know that the definition of work is given by the following expresion:

the distance is 1.5 meters and the Force is equal to 1000 N.
Replacing this values in the work expresion

And the power is equal to the amount of work done in a given time, therefore we have:

Time in seconds

F=ma
Force is 50N. Acceleration is 25 m/s^2.
50N=m*25 m/s^2
Divide both sides by 25.
mass=2 kg