In a scenario where an object's initial kinetic energy is 40 J and its final potential energy is 60 J, what is the work done if energy is conserved?
Options
A
100 J
B
0 J
C
-20 J
D
20 J
Answer & Analysis
Answer
D
Analysis
If energy is conserved, the total mechanical
energy remains constant. In this case, the work done can be calculated by
comparing the change in kinetic energy to the change in potential energy.
The initial kinetic energy is 40 J, and the
final potential energy is 60 J.
The total initial energy is: 40J
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