POE Simple Machines

Front

Mechanical Advantage (MA) is:
- Ratio of the magnitude of the resistance and effort forces
- Ratio of distance traveled by the effort and the resistance force
- All of the above
- None of the above

Back

All of the above

Front

If MA is greater than 1, what happens to the effort force required to overcome the resistance force?

Back

Proportionally less effort force is required to overcome the resistance force

Front

Which simple machine will have a mechanical advantage less than 1? Options: crane, weight machine, a windmill, a conveyer belt

Back

weight machine

Front

An inclined plane is 15 meters long and raises 3 meters high. If you want to push a 20 N box up the inclined plane, how much effort force will you need? Remember, FeDe = FrDr. Options: 900 N, 4 N, 2.25 N, 100 N

Back

4 N

Front

What is the ideal mechanical advantage if a pulley has 5 strands?

Back

5

Front

Tommy and Jimmy are on a seesaw. Tommy weighs 40 lb and Jimmy weighs 30 lb. What is the Mechanical Advantage when Jimmy makes the two boys level?

Back

1.3

Front

Calculate the ideal mechanical advantage (IMA) for a stairway with a pitch of 1/0.005 and a radius of 3ft. Formula: IMA = (2πR)/pitch

Back

0.09

Front

A wheelbarrow is carrying 50 lb of cement. The radius of the wheel is 10 inches and the radius of the axle is 4 inches. What effort force is needed to move the cement if the axle is driving the wheel? Remember FeDe = FrDr. Options: 12.5 lb, 125 lb, 4 lb, 20 lb

Back

125 lb

Front

What is the mechanical advantage of a crane if a 2 lb chocolate is lifted with 1.5 lb of force effort?

Back

1.33

Front

David wants to lift Moses using a moveable pulley. If Moses weighs 150 lbs, and David uses a force of 30 lbs, how much is the mechanical advantage?

Back

5