Answer the following questions regarding simple machine systems. Each question requires proper illustration and annotation, including labeling of forces, distances, direction, and unknown values. Illustrations should consist of basic simple machine functional sketches rather than realistic pictorials. Be sure to document all solution steps and proper units.
All problem calculations should assume ideal conditions and no friction loss.
Simple Machines – Lever
A first class lever in static equilibrium has a 50lb resistance force and 15lb effort force. The lever’s effort force is located 4 ft from the fulcrum.
1.Sketch and annotate the lever system described above.
2.What is the actual mechanical advantage of the system?
FormulaSubstitute / SolveFinal Answer
AMA = 3.33
3.Using static equilibrium calculations, calculate the length from the fulcrum to the resistance force. FormulaSubstitute / SolveFinal Answer
The Essay on Simple Machines 2
Simple machines are extremely important to everyday life. They make stuff that is normally difficult a piece of cake. There are several types of simple machines. The first simple machine is a lever. A lever consists of a fulcrum, load, and effort force. A fulcrum is the support. The placing of the fulcrum changes the amount of force and distance it will take in order to move an object. The load is ...
A wheel barrow is used to lift a 200 lb load. The length from the wheel axle to the center of the load is 2 ft. The length from the wheel and axle to the effort is 5 ft.
4.Illustrate and annotate the lever system described above.
5.What is the ideal mechanical advantage of the system?
FormulaSubstitute / SolveFinal Answer
6.Using static equilibrium calculations, calculate the effort force needed to overcome the resistance force in the system. FormulaSubstitute / SolveFinal Answer
A medical technician uses a pair of four inch long tweezers to remove a wood sliver from a patient. The technician is applying 1 lb of squeezing force to the tweezers. If more than 1/5 lb of force is applied to the sliver, it will break and become difficult to remove.
7.Sketch and annotate the lever system described above.
8.What is the actual mechanical advantage of the system?
FormulaSubstitute / SolveFinal Answer
9.Using static equilibrium calculations, calculate how far from the fulcrum the tweezers must be held to avoid damaging the sliver FormulaSubstitute / SolveFinal Answer
Simple Machines – Wheel and Axle
10. What is the linear distance traveled in one revolution of a 36 in. diameter wheel? FormulaSubstitute / SolveFinal Answer
An industrial water shutoff valve is designed to operate with 30 lb of effort force. The valve will encounter 200 lb of resistance force applied to a 1.5 in. diameter axle.
11.Sketch and annotate the wheel and axle system described above.
12.What is the required actual mechanical advantage of the system? FormulaSubstitute / SolveFinal Answer
13.What is the required wheel diameter to overcome the resistance force? FormulaSubstitute / SolveFinal Answer
10.0in.
Simple Machines – Pulley System
A construction crew lifts approximately 560 lb of material several times during a day from a flatbed truck to a 32 ft rooftop. A block and tackle system with 50 lb of effort force is designed to lift the materials.
14.What is the required actual mechanical advantage?
FormulaSubstitute / SolveFinal Answer
15.How many supporting strands will be needed in the pulley system? FormulaSubstitute / SolveFinal Answer
A block and tackle system with nine supporting strands is used to lift a metal lathe in a manufacturing facility. The motor being used to wind the cable in the pulley system can provide 100 lb of force.
The Term Paper on Performance of Information Systems through Organizational Culture
The objective of this paper is to determine the importance of the connection between the organizational culture and the information system which can be vital to achieve essential business goals. However the proper definition of information system (IS) is important, as different people create confusion in this respect, which according to Anderson (1992) it is the system which captures, records, and ...
16.What is the mechanical advantage of the system?
FormulaSubstitute / SolveFinal Answer
17.What is the maximum weight of the lathe?
FormulaSubstitute / SolveFinal Answer
Simple Machines – Inclined Plane
A civil engineer must design a wheelchair accessible ramp next to a set of steps leading up to a building. The height from the ground to the top of the stairs is 2 ft. Based on ADA codes, the slope must be 1:12 or less. Slope is equal to the rise of the ramp divided by the run of the ramp. 18. Sketch and annotate the inclined plane described above.
19. Using the ADA code, what is the allowable minimum length of the ramp base? FormulaSubstitute / SolveFinal Answer
20. Using the known height and calculated base length, what is the length of the slope of the ramp? FormulaSubstitute / SolveFinal Answer
21. What is the ideal mechanical advantage of the ramp?
FormulaSubstitute / SolveFinal Answer
22. If a person and wheelchair have a combined weight of 185 lb, how much ideal effort force is required to travel up the ramp? FormulaSubstitute / SolveFinal Answer
E=15.4lbs
Simple Machines – Wedge
A hydraulic shear applies a 2000 lb force to a wedge. It is used to shear plate steel to rough size. The shear has a ¼ inch thick cutting blade with a 45 degree slope. (Note 45°, 45°, 90° triangle)
23.Sketch and annotate the wedge described above.
24.What is the length of the slope?
FormulaSubstitute / SolveFinal Answer
= 0.354in.
25. What is the ideal mechanical advantage of the wedge?
FormulaSubstitute / SolveFinal Answer
MA=1.00
Simple Machines – Screw
A 7/16 nut driver with a 1 1/2 inch diameter handle is used to install a ¼ 20 UNC bolt into a robotic arm.
26.Sketch and annotate the screw system described above.
27. Determine the circumference where the effort is applied. FormulaSubstitute / SolveFinal Answer
28. Determine the pitch of the screw.
FormulaSubstitute / SolveFinal Answer
29. What is the mechanical advantage gained in the system?
The Essay on Ball Bearing Height Slope Range
Planning The experiment is to determine the horizontal motion of a projectile when launched from a 'ski slope at different speeds. It is thought that the rate at which the ball bearing is released from the slope will affect how far it travels in a horizontal direction. The height up the slope that the ball is released will be proportional to the distance that it travels. Therefore, if the height ...
FormulaSubstitute / SolveFinal Answer
30. How much force can be overcome if 5 lb of force is exerted? FormulaSubstitute / SolveFinal Answer
