A 650kg student climbs a set of stairs in a time of 4.0 seconds. The stairs are 5m high. Calculate the work done on the student.
A. 31,850 J
B. 318.50 J
C. 31,850W
D. 13,000 J
Calculate the power generated by the student in the question above.
A. 127,400 J
B. 7,962.5 J
C. 7,962.5W
D. 13,000W
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Mass of the student = 650 kg (How can someone weigh this much!)
Height he climbs = 5 m
Work done by him = Force × Displacement
= mgh (As work is done against the gravity, So they will be equal in magnitude)
= 650 × 9.8 × 5 = 31850 J
Power generated = Work/time taken = 31850/4
= 7962.5 Watt
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