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A girl of mass 62kg ran up a flight of 12 steps each 7cm high is 5 second.fine the power she used (g=10ms~2)

7 answers

power = force*distance/time = mgh/t

(62kg * 10N/kg) * (12steps * 7cm/1step * 1m/100cm)/5s = 10.416W

A girl of mass 62kg ran up a flight 12steps each 7cm high of 5seconds the power she used[g=10ms-2]

Sience

M=62kg

H=0.07*12=0.84m
T=5s
g=10ms^-2
P=mgh/t
=62*10*0.84/5
=104.16watts

Answer

m=62kg

h=12×7-84cm to m=0.84m
t=5s
g=10ms–²
Workdone=mgh=62×10×0.84=520.8J

To find power, we can use the formula:

power = work done / time

So,

power = 520.8 J / 5 s
power = 104.16 W

Therefore, the girl used a power of 104.16 watts while running up the flight of stairs.

Did you know?

Did you know that power is a measure of how fast work is done? In this interesting scenario, a girl with a mass of 62kg ran up a flight of 12 steps, each measuring 7cm in height, in just 5 seconds. By using the acceleration due to gravity, which is approximately 10m/s², we can calculate the power she used. Power is found by dividing the work done by the time taken. By multiplying her mass, the height of the steps, and the acceleration due to gravity together, we can determine the work done. Dividing this work by the time taken, we can discover the power she used to accomplish this feat. Understanding power helps us appreciate the impressive physical abilities of individuals like this girl and the energy required to achieve such accomplishments.