A 50 N girl climbs the ladder with a 60 N painting in 5 seconds. She has done 120 J of work. How much power does she need?
P = W(joules)/t(time in sec)
120J / 5 seconds
= ?
To calculate the power, we can use the formula:
Power = Work / Time
Given that the girl has done 120 J of work in 5 seconds, we can substitute those values into the formula:
Power = 120 J / 5 s
To find the power, we divide the work by the time:
Power = 24 J/s
Therefore, the girl needs 24 watts of power to climb the ladder with the painting.
To determine the power required by the girl, we need to calculate the amount of work done per unit time.
The formula to calculate power is:
Power = Work / Time
Given that the girl has done 120 J of work in 5 seconds, we can substitute these values into the formula to find the power:
Power = 120 J / 5 s
Dividing 120 J by 5 s, we find:
Power = 24 J/s
So, the girl needs a power output of 24 Joules per second (also known as watts) to climb the ladder with the painting.