Bob lifts his cat in 5 seconds to a height of 1.5meters. He uses 50N of force. How much power is used?
Power is defined as the rate at which work is done, and can be calculated using the formula:
Power = Work / Time
In this case, the work done is the force multiplied by the distance:
Work = Force * Distance
= 50N * 1.5m
= 75 Joules
The time taken is given as 5 seconds.
Using the formula for power, we can now calculate:
Power = Work / Time
= 75 Joules / 5 seconds
= 15 Watts
Therefore, Bob's power output is 15 Watts.