(a) If the zero of potential energy is at infinity, the total energy of an orbiting satellite is negative of its
kinetic/potential energy.

Answer:
(a) Kinetic energy

(a) Total mechanical energy of a satellite is the sum of its kinetic energy (always positive) and potential
energy (may be negative). At infinity, the gravitational potential energy of the satellite is zero. As the
Earth­satellite system is a bound system, the total energy of the satellite is negative.
Thus, the total energy of an orbiting satellite at infinity is equal to the negative of its kinetic energy.
please explain this in a better way ,may be diagrammatically. i did not understood this answer.

In the above case one should know that the PE of the satellite will be negative and its magnitude is given as:PE =-  G×M×m(R+h)  ------ (1)and the kinetic energy is positive and its magnitude is given by KE= 12×PE = G×M×m2×(R+h),     ------ (2)Now ,Total energy (TE) = PE + KETE = -  G×M×m(R+h) + G×M×m2×(R+h)TE =- G×M×m2×(R+h)    ----- (3)Comparing (2) and (3)TE = - KE This magnuiitude of the TE is  (-1)×magnitude of KEAnd hence the statement of the question

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total energy can be positive if it has infinite r from earth BT satellite have finite so it can never have value of total energy = o or +ve
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