Rosie (mass 58 kg) pushes a box with a horizontal force of 120 N (26.976 lb) at a speed 25 m/min. What is Rosie’s power output?
Answer in units of W
To find Rosie's power output, we need to use the formula:
Power = Force × Velocity
First, let's convert the speed from meters per minute to meters per second since power is typically measured in watts (W), which are derived from meters per second (m/s). To convert, we divide the speed by 60:
25 m/min ÷ 60 = 0.4167 m/s
Next, we can calculate the power output using the given force and speed:
Power = 120 N × 0.4167 m/s = 50 W
Therefore, Rosie's power output is 50 watts (W).
Force x Velocity = Power
Her mass doesn't matter