Levers
Location of a fulcrum
What is between the effort and the resistance forces?
The formula for efficiency
What is (AMA/IMA)×100?
The IMA of a wheel and axle driven by the axle when:
wheel diameter: 16
axle diameter: 4
The pitch of a screw with a thread pitch of 26
What is 1/26?
The units that force should always be in
What is Newtons?
The lever class of a pair of tweezers
What is a 3rd class lever?
The formula for moment
What is distance × force?
The mechanical advantage of a ferris wheel rounded to the nearest hundredth when it has:
A wheel with a diameter of 1830cm
An axle with a diameter of 84cm
What is 21.79?
The circumference where the effort is applied of a 7 inch long wrench
(round to tenths place)
What is 37.7?
Where gears transfer their energy
What are teeth?
Efficiency of this lever, given these values:
IMA: 45
AMA: 25
(round to the nearest full number)
What is 56%?
The formula for gear ratio
What is teeth (driven)/teeth (driver)?
This is equal to the IMA on a pulley
What is the number of strands?
The slope of an inclined plane, given this information:
Base: 27 ft
Height: 108 ft
4 ft
the rpm of larger gears is _____ than the rpm of a smaller gear
What is slower?
The distance effort of this lever, given these values:
Force resistance: 50 lbs
Force effort: 15 lbs
Distance resistance: 4 ft
(round to the tenths place)
What is 1.2 ft?
The formula for the total IMA of a compound machine (in this scenario, it is composed of two simple machines)
What is (IMA of simple machine 1) × (IMA of simple machine 2)
The AMA of a pulley when it is pulling 400 lbs of material with 25 lbs of effort force
What is 16?
The efficiency if a person has to move 500 lbs of material up a ramp and uses 50 lbs of effort force. The IMA of the system is 15.
(round to the nearest whole number)
What is 67%?
The energy transferred when a force is applied to an object
What is work?