3. If a machine exerts a 200 N force to lift a 1250 N object, what is the mechanical advantage of the machine? 4. A 4 m inclined plane (ramp) is used to lift a heavy container into a railroad car that is 1.5 m above the platform. What is the mechanical advantage of using the ramp?

5. A machine does 60 J of work as it exerts a force of 4 N through a distance of 20 m.

How efficient is the machine?

6. Using levers, a 10, 000 N car is raised a distance of 5 m by an effort force of 500 N (assume an ideal level with No friction)

What is the work output?
What is the mechanical advantage of the level
Using M. A. = length/height, what is the effort distance?
What is the work input?
What is the mechanical efficiency of the level in an ideal frictionless machine?