Question

An artificial satellite is made to move in circular orbits of different radii around the earth. The variation of its K.E, P.E and total energy (T) in different orbits is shown in the figure by different curves. Then for the satellite,

• A. A represents the K.E, B represents the P.E and C represents the total energy
• B. A represents the P.E, B represents the K.E and C representsthe total energy
• C. A represents the P.E, B represents the total energy and C represents the K.E
• D. A represents the total energy, B represents the K.E and C represents the P.E

Answer 1

The correct option is C A represents the P.E, B represents the total energy and C represents the K.E

$P.E=-\frac{GMm}{r}F=ma\Rightarrow \frac{GMm}{r^2}=\frac{m{v}^2}{r}\&K.E=\frac{m{v}^2}{2}=\frac{GMm}{2r}T=K.E+P.E=-K.EK.E=-\frac{P.E}{2}$
So, K.E will be represented by curve C and P.E by curve A and Total energy by curve B