Rosie (mass 47 kg) pushes a box with a horizontal force of 140 N (31.472 lb) at a speed 15 m/min.
What is Rosie's power output?
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To calculate Rosie's power output, we need to use the formula:
Power = Force × Velocity
First, we need to convert Rosie's speed from meters per minute to meters per second:
15 m/min * (1 min / 60 s) = 0.25 m/s
Now we can substitute the values into the formula:
Power = 140 N × 0.25 m/s
Power = 35 W
Therefore, Rosie's power output is 35 Watts.