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21 September, 19:35

Neglecting air resistance and the weight of the propellant, determine the work done in propelling a four-ton satellite to the following heights. a) 100 miles above Earth. b) 300 miles above Earth.

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  1. 21 September, 21:12
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    Step-by-step explanation:

    Work = force * distance

    force = mass * acceleartion due to gravity

    a four ton satellite will have a force of 4 * 1000 * 10 = 40KN (1000Kg = 1 ton)

    1 mile = 1609.34 metre

    therefore (a) 100 miles above the earth

    work = 40000 * 100*1609.34

    = 6437360000J

    =6.4GJ

    (b) 300 miles above the earth

    work = 40000*300*1609.34

    = 1.93*10¹⁰ J
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