The change in gravitational potential energy $$\(\Delta E\)$$ of an object of mass $$\(m\)$$ when moving through height $$\(\Delta h\)$$ near the surface of the Earth is given by the equation shown. $$\[ \Delta E=m g \Delta h \]$$ Which equation is needed as part of the derivation of this expression?
A.
kinetic energy \(=\frac{1}{2} \times\) mass \(\times(\text { speed })^{2}\)
B.
moment \(=\) force \(\times\) distance
C.
weight \(=\) mass \(\times\) acceleration of free fall
D.
work done \(=\) power \(\times\) time
Exam No：9702_w20_qp_12 Year：2020 Question No：18
Answer:
C
Knowledge points:
6.3.5 derive, from the defining equation W = Fs, the formula DEp = mgDh for potential energy changes near the Earth’s surface
6.4.2 solve problems using the relationships and
Solution:
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