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physics question!?
A girl uses a lever to lift a box. The box has a resistance force of 260N while she exerts an effort
force of 175N. What is the mechanical advantage of the lever?
1 Answer
- 4 years agoFavorite Answer
For any lever we have fulcrum, the load point and the effort point.
If a and b are distances from the fulcrum to points A and B and if force FA applied to A is the input force and FB exerted at B is the output, the ratio of the velocities of points A and B is given by a/b, so the ratio of the output force to the input force, or mechanical advantage, is given by
MA = FB/FA = a/b.
Here we use FB= 260N, FA= 175N.
So MA= 1.49.
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