to get there you need at least three level 8's. To get one level 8, you need at least 3 level 7's. And so on and so forth until you are at level 1. The trick though is that if I have 5 of a certain level, I can make 2 of the next. If I have 8, I can make 3. How many level 1's would i need to make a level 9, using the fewest possible level 1's?
work easier. I have several problems: a) I dont have any ideas on machines. B) I need help really in general. So far i have 7 examples them being a wheelbarrow, a pulley, a ramp, an ax(e) and a hockey stick. I was wondering if you could help me explain how they make work easier. Also, I'm having trouble identifying the input and ouput forces on these machines. Please help. Btw, im grade 8.