What is the average weight of 8-year-old boy?

A boy and a girl are dropping coins into a wishing well. The boy drops a 1 euro coin (weight 7.5 g) and the gi?

  • A boy and a girl are dropping coins into a wishing well. The boy drops a 1 euro coin (weight 7.5 g) and the girl a 10 cent coin (weight 4.1 g). Assume the well is 7 meters deep. (i) ...show more

  • Answer:

    1. weight is irrelevant. t = √(2h/g) = √(2•7/9.8) seconds 2. 9.8 m/s² 3. t = 1s = √(2h/g) = 2h/9.8 h = 9.8/2 = 4.9 meters 4. need the depth of the water.

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