1. An inclined plane as shown in figure 1 is used to raise an object of mass 30 kg. If the plane is inclined 5 above the horizontal and the coefficient of friction is 0.20, calculate the ideal mechanical advantage, actual mechanical advantage, and the efficiency of this machine.

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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1. An inclined plane as shown in figure 1 is used to raise an object of mass 30 kg. If the plane is
inclined 5 above/the horizontal and the coefficient of friction is 0.20, calculate the ideal
mechanical advantage, actual mechanical advantage, and the efficiency of this machine.
2. The pitch of a jackscrew shown in figure 2 is 0.3 cm and has a lever arm of 60 cm length.
What force at the end of the lever arm will raise a load of 190 kg if the efficiency of the machine
is 12 %?
3. The IMA of the pulley system shown in figure 3 is 4, how far must the applied force move if
the load moves 1 ft? If the load weighs 200 lb and the efficiency of the system is 90 %, what
must be the applied force?
Transcribed Image Text:1. An inclined plane as shown in figure 1 is used to raise an object of mass 30 kg. If the plane is inclined 5 above/the horizontal and the coefficient of friction is 0.20, calculate the ideal mechanical advantage, actual mechanical advantage, and the efficiency of this machine. 2. The pitch of a jackscrew shown in figure 2 is 0.3 cm and has a lever arm of 60 cm length. What force at the end of the lever arm will raise a load of 190 kg if the efficiency of the machine is 12 %? 3. The IMA of the pulley system shown in figure 3 is 4, how far must the applied force move if the load moves 1 ft? If the load weighs 200 lb and the efficiency of the system is 90 %, what must be the applied force?
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