(b) An Earth satellite moves in a circular orbit 640 km above Earth's surface with a period of 98.0 min. What are the (a) speed and (b) magnitude of the centripetal acceleration of the satellite? (4)

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A: a)The required astronaut’s orbital speed is,

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Q: An Earth satellite moves in a circular orbit 640 km (uniform circular motion) above Earth’s surface…

A:

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A: Centripetal acceleration can be expressed as a=v2r

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A: a. speed at the equator is  v=Rω=R2πt=6.38×106m2π1day×86400s1day=4.64×102m/s

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A: Here acceleration in the last line means centripetal acceleration

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A: a=centripetal acceleration=v2/R

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