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The value of acceleration due to gravity at Earth’s surface is 9.8 ms⁻². The altitude above its surface at which the acceleration due to gravity decreases to 4.9 ms⁻², is close to: (Radius of earth = 6.4 × 10⁶ m)(A) 6.4 × 10⁶ m (B) 9.0 × 10⁶ m(C) 2.6 × 10⁶ m (D) 1.6 × 10⁶ m |
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