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If the ratio of the length of connecting rod to the crank radius increases, then
- a)Primary unbalanced forces will increase
- b)Primary unbalanced forces will decrease
- c)Secondary unbalanced forces will increase
- d)Secondary unbalanced forces will decrease
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
If the ratio of the length of connecting rod to the crank radius incre...
Secondary force only involves ratio of length of connecting rod and crank radius and is equal to 
If n increases, value of secondary force will
decrease.
If n increases, value of secondary force will decrease.
Most Upvoted Answer
If the ratio of the length of connecting rod to the crank radius incre...
Explanation:
Connecting rod is an important component of an engine which connects the piston to the crankshaft. The ratio of the length of connecting rod to the crank radius is known as the rod ratio. This ratio affects the engine's performance and balance.
The effect of increasing the rod ratio on unbalanced forces can be explained as follows:
1. Primary unbalanced forces:
Primary unbalanced forces are those forces that are generated due to the reciprocating motion of the piston. These forces are caused by the acceleration and deceleration of the piston as it moves up and down in the cylinder. The magnitude of these forces depends on the mass of the piston, the stroke length, and the angle between the connecting rod and the crankshaft.
When the rod ratio is increased, the angle between the connecting rod and the crankshaft decreases. This results in a decrease in the magnitude of primary unbalanced forces. Therefore, option 'B' is incorrect.
2. Secondary unbalanced forces:
Secondary unbalanced forces are those forces that are generated due to the rotation of the crankshaft. These forces are caused by the centrifugal effect of the rotating components such as the crankshaft, connecting rod, and piston. The magnitude of these forces depends on the mass and radius of each component and the speed of rotation.
When the rod ratio is increased, the mass of the connecting rod increases, and the mass of the piston decreases. This results in an increase in the magnitude of secondary unbalanced forces. Therefore, option 'C' is incorrect.
Hence, the correct answer is option 'D'.
Connecting rod is an important component of an engine which connects the piston to the crankshaft. The ratio of the length of connecting rod to the crank radius is known as the rod ratio. This ratio affects the engine's performance and balance.
The effect of increasing the rod ratio on unbalanced forces can be explained as follows:
1. Primary unbalanced forces:
Primary unbalanced forces are those forces that are generated due to the reciprocating motion of the piston. These forces are caused by the acceleration and deceleration of the piston as it moves up and down in the cylinder. The magnitude of these forces depends on the mass of the piston, the stroke length, and the angle between the connecting rod and the crankshaft.
When the rod ratio is increased, the angle between the connecting rod and the crankshaft decreases. This results in a decrease in the magnitude of primary unbalanced forces. Therefore, option 'B' is incorrect.
2. Secondary unbalanced forces:
Secondary unbalanced forces are those forces that are generated due to the rotation of the crankshaft. These forces are caused by the centrifugal effect of the rotating components such as the crankshaft, connecting rod, and piston. The magnitude of these forces depends on the mass and radius of each component and the speed of rotation.
When the rod ratio is increased, the mass of the connecting rod increases, and the mass of the piston decreases. This results in an increase in the magnitude of secondary unbalanced forces. Therefore, option 'C' is incorrect.
Hence, the correct answer is option 'D'.
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If the ratio of the length of connecting rod to the crank radius increases, thena)Primary unbalanced forces will increaseb)Primary unbalanced forces will decreasec)Secondary unbalanced forces will increased)Secondary unbalanced forces will decreaseCorrect answer is option 'D'. Can you explain this answer?
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