Find distance between earth and the moon

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Q. The mass of the Moon is 7.35 x 10^22 kg. At some point between Earth and the Moon, the force of Earth's gravitational attraction on an object is cancelled by Moon's force of gravitational attraction. If the distance between Earth and the Moon (centre to centre) is 3.84 x 10^5 km, compute where this will occur, relative to Earth.

Q. A uniform plank of length 4.9m and weight 228N rests horizontally on two supports, with 1.10m of the plank hanging over the right support. To what distance x can a person who weighs 449N walk on overhanging part of the plank before it just begins to tip?

Reference no: EM1372673

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