Essay
SAMPLE PROBLEMS:
. 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.
Sketch and annotate the lever system described above. |
What is the actual mechanical advantage of the system? Formula | Substitute / Solve | Final Answer | | | AMA = 3.33 | *
Using static equilibrium calculations, calculate the length from the fulcrum to the resistance force. Formula | Substitute / Solve | Final Answer | | | |
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.
Illustrate and annotate the lever system described above. |
What is the ideal mechanical advantage of the system? Formula | Substitute / Solve | Final Answer | | | | *
Using static equilibrium calculations, calculate the effort force needed to overcome the resistance force in the system. Formula | Substitute / Solve | Final 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.
Sketch and annotate the lever system described above. |
What is the actual mechanical advantage of the system? Formula | Substitute / Solve | Final Answer | | | |
Using static equilibrium calculations, calculate how far from the fulcrum the tweezers must be held to avoid damaging the sliver Formula | Substitute / Solve | Final Answer | | | |
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.
Sketch and annotate the screw system
. 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.
Sketch and annotate the lever system described above. |
What is the actual mechanical advantage of the system? Formula | Substitute / Solve | Final Answer | | | AMA = 3.33 | *
Using static equilibrium calculations, calculate the length from the fulcrum to the resistance force. Formula | Substitute / Solve | Final Answer | | | |
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.
Illustrate and annotate the lever system described above. |
What is the ideal mechanical advantage of the system? Formula | Substitute / Solve | Final Answer | | | | *
Using static equilibrium calculations, calculate the effort force needed to overcome the resistance force in the system. Formula | Substitute / Solve | Final 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.
Sketch and annotate the lever system described above. |
What is the actual mechanical advantage of the system? Formula | Substitute / Solve | Final Answer | | | |
Using static equilibrium calculations, calculate how far from the fulcrum the tweezers must be held to avoid damaging the sliver Formula | Substitute / Solve | Final Answer | | | |
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.
Sketch and annotate the screw system