Practice question

MCQ

Question

A body weighs 392N on Earth’s surface. What is its weight at a height h\=RE/6? (g\=9.8m/s2)

Choose one · Correct answer highlighted

286 N 288 N Correct 290 N 292 N

g(h) = g(1+h/RE)2. h = RE/6, 1+h/RE = 1+1/6 = 7/6. g(h) = 9.8(7/6)2 = 9.8×3649 = 7.2m/s2. Mass: m = 392/9.8 = 40kg. Weight: W = 40×7.2 = 288N.

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