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In order to rotate a body, we need to apply
- a)two forces at two ends but in the same direction
- b)a large force at any point on the body
- c)Two equal forces at two ends but in the opposite direction
- d)a small force but exactly at its centre of gravity
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
In order to rotate a body, we need to applya)two forces at two ends bu...
In order to rotate a body, we need to apply two equal forces at two ends but in the opposite direction.
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In order to rotate a body, we need to applya)two forces at two ends bu...
Explanation:
Two equal forces at two ends but in the opposite direction:
When we want to rotate a body, we need to apply two equal forces at two ends of the body but in the opposite direction. This is known as a couple. The two forces create a moment that causes the body to rotate.
Importance of opposite direction:
The forces must be in opposite directions to prevent the body from translating in a particular direction. If the forces were in the same direction, the body would simply move linearly rather than rotate.
Effect of unequal forces:
If the forces were unequal, there would be a net force acting on the body, causing translational motion rather than pure rotation. This is why it is important for the forces to be equal in magnitude.
Creating a torque:
By applying two equal and opposite forces at two ends of a body, a torque or moment is generated. This torque causes the body to rotate around its center of mass.
Stability and balance:
Applying forces in this manner helps maintain stability and balance in the body's rotation. It ensures that the body rotates smoothly without any jerks or wobbling.
In conclusion, applying two equal forces at two ends but in opposite directions is essential for rotating a body effectively and efficiently. It creates a balanced torque that results in smooth rotation without any undesired translational motion.
Two equal forces at two ends but in the opposite direction:
When we want to rotate a body, we need to apply two equal forces at two ends of the body but in the opposite direction. This is known as a couple. The two forces create a moment that causes the body to rotate.
Importance of opposite direction:
The forces must be in opposite directions to prevent the body from translating in a particular direction. If the forces were in the same direction, the body would simply move linearly rather than rotate.
Effect of unequal forces:
If the forces were unequal, there would be a net force acting on the body, causing translational motion rather than pure rotation. This is why it is important for the forces to be equal in magnitude.
Creating a torque:
By applying two equal and opposite forces at two ends of a body, a torque or moment is generated. This torque causes the body to rotate around its center of mass.
Stability and balance:
Applying forces in this manner helps maintain stability and balance in the body's rotation. It ensures that the body rotates smoothly without any jerks or wobbling.
In conclusion, applying two equal forces at two ends but in opposite directions is essential for rotating a body effectively and efficiently. It creates a balanced torque that results in smooth rotation without any undesired translational motion.
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In order to rotate a body, we need to applya)two forces at two ends bu...
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In order to rotate a body, we need to applya)two forces at two ends but in the same directionb)a large force at any point on the bodyc)Two equal forces at two ends but in the opposite directiond)a small force but exactly at its centre of gravityCorrect answer is option 'C'. Can you explain this answer?
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