# Alb Mod (formulas) Force and motion Flashcards

To find mechanical advantage with load and effort

MA = L/E

To find mechanical advantage with load distance and effort distance

MA = ED/LD

Work done on one side of a lever is equal to work done on the other side. What formula expresses this?

E x ED = L x LD

What is the measurement of the acceleration of gravity?

9.81 m/s^2

What is a first class lever?

lever with fulcrum in the middle

Fle

123

What is a second class lever?

lever with the load in the middle

fLe

123

What is a third class lever?

Lever with the effort in the middle

flE

123

When working with wheels, what is the effort distance?

radius of the wheel work is applied to

When working with wheels, what is the load distance?

radius of the wheel the load is applied to

To calculate the force applied using a weight and acceleration, you would use the formula:

F = M x A

With an inclined plane, the effort distance is the:

Hypotenuse

With an inclined plane, the load distance is the:

vertical height

With a screw jack, your effort distance is the circumference of the circle your handle makes in a full revolution. What is the formula to find effort distance on a screw jack?

ED = 2 x 3.1416 x r

With a screw jack, your load distance is your:

screw jack thread pitch

The mechanical advantage of a pulley is:

The number of strands supporting the load. May or may not include the effort strand