A star that is moving toward an observer has its visible light shifted toward which end of the spectrum? A. blue B. red C. yello
2 answers:
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Answer:A
Explanation:
Given
Skier A takes straight, smooth route while Skier B takes curvy, bumpy route to finish.
We know gravity is conservative in nature i.e. work done against it is independent of path followed
So work done by gravity for A and B is same
According to Work energy Theorem Change in the kinetic Energy is equal to work done by all the forces.
where h=vertical height of hill
thus
which is same for both A and B