Q. 483.6( 9 Votes )

In an experiment to measure his power, a student records the time taken by him in running in a flight of steps on a staircase. Use the following data to calculate the power of the student:

Number of steps = 28

Height of each step = 20 cm

Time taken = 5.4 s

Mass of student = 55 kg

Acceleration = 9.8 m s-2

Due to gravity

Answer :

Number of steps = 28

Height of each step = 20 cm


Total height of student = 28 * 20 = 560 cm


= 5.6 m


Time, t = 5.4 sec


Mass of student, m = 55kg


Acceleration due to gravity, g = 9.8 m/s2


Power = =


= = 559W (approx)


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