Assuming both staircases are of equal height from the ground floor, then the nature of the staircase does not change the gravitational potential energy.
We can, from information given, find the height of the floor, and then apply to the child using the standard formula, E=mgh.
However, in this case, it is a matter of proportions, i.e.
81.0 kg : 2.25 kJ
17.5 kg : x kJ
cross multiply to get
x=2.25*17.5/81=0.486 kJ (or 486 J) to three significant figures.
I think you can just sub the values in? unless the qn is asking for smth else?
Answer:
The answer is Friction.
Hope this helps :)
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As we know that acceleration due to gravity is given by
here we know that
g = 3.60 m/s^2
M = ?
now we have
so above is the mass of Mars
