Question

Which two physical quantities must be used to calculate the power developed by a student running up a flight of steps?

Answer 1

Answer:

Multiply your weight by 9.81 -- which accounts for the force of gravity -- and then multiply the result by the stairway's height. Divide the answer by your climbing time in seconds to determine how many watts of power you generated.

Explanation:

Answer 2

Joules (J) are used to measure work and energy, whereas watts are used to measure power. where m is the object's mass in kilograms, g is the gravitational acceleration (9.8 m/s2), and h is the height to which the mass is raised.

Work and energy are inextricably linked. According to the work–energy principle, an increase in the kinetic energy of a rigid body is generated by an equivalent amount of positive work done on the body by the force acting on it.

The following are the SI basic units: SI unit: joule 1 kgm2s2 (J)