5) a freely falling rock has a weight of 9.8N. The earth's mass is 6×10²⁴kg.

5a) the mass of the apple is 1kg (T, F)

5b) the force exterted by the earth on the rock is 9.8N (T, F)

5c) the force exerted by the rock on the earth is 9.8N (T, F)

5d) the acceleration of the earth is of order of 10^-23 m/s² (T, F)

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