General Physics

Problem:http://screencast.com/t/D1QJrOGei0t
Solution: http://screencast.com/t/2I5u1kq7

Question: Can you please tell me why he choses 75 for the total distance travelled ? He clearly doesn't take into account that in order he has to count 2x times the distance from when he throw to when the item is falling , because that distance is covered Two times hence 2*7.3+75 = 89.6 ?

Question

General Physics

Problem:http://screencast.com/t/D1QJrOGei0t
Solution: http://screencast.com/t/2I5u1kq7

Question: Can you please tell me why he choses 75 for the total distance travelled ? He clearly doesn't take into account that in order he has to count 2x times the distance from when he throw to when the item is falling , because that distance is covered Two times hence 2*7.3+75 = 89.6 ?

anonymous · Answer

he's using the coordinate system where y=0 is the top of the cliff

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