Grandma Jones lifts the baby 3m. It took her 20 seconds and she used a force of 70N.How much power was used?
To calculate the power used, we need to use the formula:
Power = Work / Time
The work done is equal to the force applied multiplied by the distance lifted:
Work = Force × Distance
So, to determine the power used, we need to calculate the work done first:
Work = 70N × 3m = 210 J
Now we can find the power used by dividing the work done by the time taken:
Power = 210 J / 20 s = 10.5 W
Therefore, Grandma Jones used a power of 10.5 Watts.