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Hi everyone.
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We have a question in which we have given that the mass of the man which climbs a stairs having a 30 steps in 30 seconds.
00:09
That means in the given question but we have given that the mass of the person.
00:15
So mass of men we have given and let's say it is equal to m.
00:26
It is 50 kg and we have also given that the time for a the time for climbing these steps of the stairs is 30 seconds so we can say that time for climbing let's say t we have also given that it is equal to 30 second and the number of steps number of steps in the stair is also 30 and the height of the each step is 20 centimeter and the height of of each step, let's say small h is equal to 20 centimeter.
01:22
And also we have given that the value of g, that means the value of acceleration due to gravity.
01:29
The value of g is also given and it is equal to 10 meter per second square.
01:33
So what we need to find, we need to calculate the power used in climbing the stair.
01:38
So we need to find the power in this case.
01:44
And the power is represented by p, let's see, how can we find this power so first of all we need to understand power and power is nothing power is equals to just the work done in the given time work done by any object in the given time and the work done is nothing work done is just in this case as we know that it is climbing in upward direction that means work done is nothing it is just the potential energy stored in that object that the potential energy is stored in that object divided by the time taken to store that energy.
02:24
So this is in this case the power which is p.
02:28
Let us first of all find the potential energy.
02:30
So potential energy is nothing.
02:35
Potential energy is m g, h...