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omgitsmonica
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Homework Statement
At what rate is a 50 kg boy using energy when he runs up a flight of stairs 10 m high, in 7 s? Provide answer in watts. (Hint: Rate of change of energy is power) Use g=10 m/s2.
Homework Equations
F=ma
W=Fd
P=W/T
The Attempt at a Solution
10/7 = .143 = A
F = MA, so F = .143*50 = 7.15
W = FD, so W = 7.15 *10
P = W/T, so P = 71.5/7
Is that right? Am I using the correct acceleration and distance and time, or is there more complicated math involved than I thought?