a stone is dropped from the edge of a roof: (a) how long does it take to fall 4.9 metre? (b) how fast does it move at the end of that Fall? (c) what will be its acceleration after 1 second and after 2 second?
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(a) 1 sec (b) 9.8 m/s (c) both will be 9.8 m/s^2
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