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A rocket with mass 4.00×103 kg is in a circular orbit of radius 7.40×106 m around...

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Physics

A rocket with mass 4.00×103 kg is in a circular orbitof radius 7.40×106 m around the earth. The rocket'sengines fire for a period of time to increase that radius to8.90×106 m, with the orbit again circular.

a) What is the change in the rocket's kinetic energy? Does thekinetic energy increase or decrease?

b) What is the change in the rocket's gravitational potentialenergy? Does the potential energy increase or decrease?

c) How much work is done by the rocket engines in changing theorbital radius

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