Answer:
Theoretical M.A. = 40 cm / .5 cm = 80
Actual M.A. = 80 * .2 = 16
F * 16 = 280 kg F here is actually mass because 280 kg is mass
F = 280 kg / 16 = 17.5 kg
F (Newton's) = 9.8 m/s^2 * 17.5 kg = 172 N
27.5N of effort force is required to lift a load w of 280kg
The force used to move an object over a distance. resistance force: The force which an effort force must overcome in order to do work on an object via a simple machine.
given
length of liver arm = 40 cm = 0.40 m
pitch = 5mm = 0.005 m
IMA = 2[tex]\pi[/tex](0.40) / pitch
= (2 * 3.14 * 0.40) / 0.005
= 0.50 * [tex]10^{3}[/tex]
since , efficiency = AMA / IMA
AMA = 0.20 * 0.50 * [tex]10^{3}[/tex]
= 0.1 *[tex]10^{3}[/tex]
AMA = Force of resistance / effort force
0.1 *[tex]10^{3}[/tex] = 280 * 9.81 / effort force
effort force = 280 * 9.81 /0.1 *[tex]10^{3}[/tex] = 27.47 N≈ 27.5N
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