Explanation:
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Answer:
14523.55J
Explanation:
The work done by the jogger against gravity is given by the following equation;
where m is the mass, g is acceleration due to gravity taken as and h is the height of the hill.
Since the length of the hill is 132m and it is inclined at 12 degrees to the horizontal, the height is thus given as follows;
Substituting this into equation (1) with all other necessary parameters, we obtain the following;
Vector 1 has components
and vector 2 has
Add these vectors to get the resultant, which has components
The magnitude of the resultant is
with direction such that
or about 50º N of E.