mechanisms jeopardy q $100 q $200 q $300 q $400 q $500 q $100 q $200 q $300 q $400 q $500 final...
TRANSCRIPT
Mechanisms JeopardyLevers / Incline Planes
Wheel & Axles / Pulleys
Screws / Wedges
Gears / Chain Drives
Key Words
Q $100
Q $200
Q $300
Q $400
Q $500
Q $100 Q $100Q $100 Q $100
Q $200 Q $200 Q $200 Q $200
Q $300 Q $300 Q $300 Q $300
Q $400 Q $400 Q $400 Q $400
Q $500 Q $500 Q $500 Q $500
Final Jeopardy
$100 Levers / Inclined Planes
Of the three classes, the __________ is the only one in which the effort force and the load force act in the same direction.
$100 Levers / Inclined Planes
1st–class lever
$200 Levers / Inclined Planes
An inclined plane with an IMA of 3.69 and an AMA of 2.97 is _______ efficient.
$200 Levers / Inclined Planes
80.5%
$300 Levers / Inclined Planes
_____________ levers, like the one in the diagram below, will always have a mechanical advantage with a value ________________.
$300 Levers / Inclined Planes
3rd-class;
between 0 and 1
$400 Levers / Incline Planes
The ideal effort force that would be needed to move this lever in the absence of friction is _______ .
$400 Levers / Incline Planes
75 pounds
$500 Levers / Inclined Planes
__________ is the ideal mechanical advantage of this inclined plane. 99 in..
$500 Levers / Inclined Planes
2.93
$100 Wheel and Axles / Pulleys
The ideal mechanical advantage of a pulley system is indicated by the ______________.
$100 Wheel & Axles / Pulleys
Number of Support Cables
$200 Wheel & Axles / Pulleys
___________ is the linear distance traveled in one revolution by a wheel with a 21 inch diameter.
$200 Wheel & Axles / Pulleys
65.94 inches
$300 Wheel & Axles / Pulleys
A wheel and axle system that is 75% efficient contains an axle that has an 8 inch diameter. The distance from the center of the axle to the crank handle is ___________ , given that the system’s ideal mechanical advantage is 4.
$300 Wheel & Axles / Pulleys
16 inches
$400 Wheel & Axles / Pulleys
The pulley system shown is ________ efficient.
$400 Wheel & Axles / Pulleys
67 %
$500 Wheel & Axles / Pulleys
A shutoff valve is designed to operate with 65 pounds of effort force. The valve will encounter 325 pounds of resistance force applied to a 4 inch diameter axle. The required wheel diameter to overcome the resistance force is __________.
$500 Wheel & Axles / Pulleys
20 inches
$100 Screws / Wedges
The diameter of the screw in diagram is __________ .
$100 Screws / Wedges
1 inch
$200 Screws / Wedges
To calculate the pitch of a unified screw thread, one must ______________________.
$200 Screws / Wedges
divide the value of 1 inch by the number of threads that occur in 1 inch parallel to the screw axis.
$300 Screws / Wedges
Make an annotated sketch of a isosceles-shaped wedge. Include all variables associated with the calculation its actual mechanical advantage.
$300 Screws / Wedges
$400 Screws / Wedges
A wrench with an 8 inch handle is used to install a ¼ - 24 UNF bolt into the engine of a truck. The mechanical advantage gained in the system is ____________.
$400 Screws / Wedges
602.88
$500 Screws / WedgesAn actual effort of 500 pounds is applied to the wedge shown. Given that the wedge’s cutting action is 90% efficient, the resistance applied to the wedge is ________.
$500 Screws / Wedges
900 pounds
$100 Gears / Chain Drives
The difference between a simple gear train and a compound gear train is ___________.
$100 Gears / Chain Drives
Simple gear trains have only one gear per shaft. Compound gear trains have at least one idler gear shaft that carries two gears.
$200 Gears / Chain DrivesThe gear ratio of the simple gear train shown is ______.
$200 Gears / Chain Drives
4 : 1
$300 Gears / Chain Drives
When calculating gear ratio, the number of teeth, diameter, and torque have direct relationships. While _____________ has an inverse relationship to the others.
$300 Gears / Chain Drives
Angular Velocity
$400 Gears / Chain DrivesIn the belt driven system shown, pulley B has a diameter of 16 inches. It is being driven by pulley A, which has a diameter of 4 inches. If pulley A is spinning at 60 RPMs, then pulley B is spinning at _____________ .
$400 Gears / Chain Drives
15 RPMS
$500 Gears / Chain DrivesA compound gear train is composed of four gears, A, B, C, and D. Gear A has 15 teeth and is meshed with gear B. Gear B has 25 teeth and shares a shaft with gear C, which has 10 teeth. Gear C is meshed with gear D, the output gear. Power is supplied at gear A with 100 ft·lb of torque and is traveling at 1600 rpm. Gear D should have _______ teeth for the system to have the necessary torque output of 800 ft·lb
$500 Gears / Chain Drives
48
$100 Key Words
The ratio of the magnitude of the resistance and effort forces applied to a system.
$100 Key Words
Actual MechanicalAdvantage
$200 Key Words
A force that produces or tends to produce rotation or torsion
$200 Key Words
Torque
$300 Key Words
A gear positioned between the driver and the driven gear used to change rotational direction.
$300 Key Words
Idler Gear
$400 Key Words
The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.
$400 Key Words
Moment
$500 Key Words
A condition where there are no net external forces acting upon a particle or rigid body and the body remains at rest or continues at a constant velocity
$500 Key Words
Static Equilibrium
Final Jeopardy
_______ is the ideal mechanical advantage of this compound machine.
Final Jeopardy Answer
36