An earth-orbiting satellite has a solar energy collecting panel with total area $5 m^{2}$ . If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is
(Solar constant $= 1.4 k W m^{- 2}$ )

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We know that, P o w e r = I × a r e a = ( 1.4 × 10 3 ) × 5 Force F = P o w e r c = 1.4 × 10 3 × 5 3 × 10 8 = 2.33 × 10 - 5 N

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