Question

When is mechanical advantage maximum in four bar mechanism?

Answer 1

Answer:

Levers can be used to exert a large force over a small distance at one end by exerting only a small force over a greater distance at the other. ... The ratio of the output force to the input force is the mechanical advantage of the lever.

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Answer 2

Mechanical advantage maximum in four bar mechanism:

Explanation:

• The mechanical advantage is the ratio of output force to the input force presented.  

• Now any mechanism can not generate power merely transmitting it if the device has 100% efficiency in transmitting it then the relation can be applied:-  

• (Mechanical advantage)*(velocity ratio)=1  
• As the output velocity tends to 0 in toggle position  
• Velocity ratio-->0  
• Hence, output force-->infinity  
• And mechanical advantage → infinite