What the kinetic energy quantities in calculation pls help me
1 answer:
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Answer:
a)
b) 26966 stairs
c) 7012 stairs
Explanation:
Given:
Mass of the woman = 64 kg
Energy intake = 459 kcal.
(a)Noe, the energy equivalent of one jelly doughnut can be calculated as
or
(b) The number of steps climbed by the woman to consume one jelly doughnut of energy can be calculated as:
The gravitational potential energy to climb each step of stair case is given as:
W = mgh
where,
m = mass
g = acceleration due to gravity
h = height up to which mass is moved
Now, Total work done to climb the n number of steps is,
W =n(mgh)
where, n is the number of steps on stairs
on rearrange, we get,
or
or
n = 26966.08 ≅ 26966 stairs
(c) The number of steps climbs by woman when the body is 26% efficient:
Therefore, number of steps:
or
n = 7011.18 ≅ 7012 stairs