A person stands at rest on a slope which makes an angle 16 degrees to the horizontal. They have a mass of 73 kg. They start to run up the slope. After a time of 7.4 s they reach a distance 23 m up the slope and have a velocity of 3.0 m/s.

(a) Calculate the vertical height gained.

  select units m kg s m/s m/s^2 N J W degrees none 

(b) Determine how much energy the person has used.

  select units m kg s m/s m/s^2 N J W degrees none 

(c) Calculate the average power output of the person.