Tortoise moved when they meet
A rabbit moves at 7 m/s and a tortoise at 0.05 m/s. They are 90 m apart when they start to move towards each other. How far has the tortoise moved when they meet.
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A uniform rod AB, of mass 0·3 kg and length 2·0 m, with three particles, of masses 0·2 kg, 0·4 kg and 0·5 kg, attached to points A, C and B respectively, where AC = 0·6 m. When the rod is suspended by strin
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