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
