Physics Homework help. Please show work
1)In a class-1 lever we know that: d1= 0.30 m, d2= 1.30 m and the load mass is 20 kg. (a) Find the applied force that keeps the balance; (b) Find the mechanical advantage of the lever.
2)In a class1 lever the mechanical advantage is M = 6. How much load force can be kept in balance with an applied force of F = 100 N?
3)In a class-2 lever we have that d1 = 20 CM and d2 = 70 CM. To keep in balance a 15 kg load, how much force has to be applied?
4)In a class-3 lever d1 = 1.10 m, d2 = 40 cm, the load is 30 kg. Find the applied force that keeps the balance.
5)In a class-3 lever the mechanical advantage is M= 0.12. If the speed of the load is 13 m/s, how much is the speed of the other lever’s end?
6)A man spreads his legs and the distance between the feet is 70 cm. The mass of this man is 80 kg and the distance from the shoulder to the feet is 150 cm. Find the limiting force that, horizontally applied to the shoulder, still keeps this person in equilibrium.
7)The mechanical advantage of a lever is doubled without changing the load. How changes the applied force that balances the load?Â
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Posted 17 Jun 2017 03:06 AM
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