POE Simple Machines

Front

Mechanical Advantage (MA) is:

Back

Ratio of the magnitude of the resistance and effort forces, Ratio of distance traveled by the effort and the resistance force.

Front

If MA is greater than 1:

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?

Back

4 N

Front

What is the ideal mechanical advantage of a pulley with 5 strands lifting a 100 kg piano?

Back

5

Front

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

The stairs leading up a lighthouse are shaped like a screw. If the pitch of the stairway was 1/0.005 and the radius of the stairway was 3ft, how much is the ideal mechanical advantage? Remember IMA = (2piR)/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

Back

125 lb

Front

What is the mechanical advantage of a crane if Mrs. Cruz exerts 1.5 lb of force to lift a 2 lb bag of chocolates?

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