- 1(current)
Q. No.The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it?
| a. | The forces may be acting radially from a point on the axis. |
| b. | The forces may be acting on the axis of rotation. |
| c. | The forces may be acting parallel to the axis of rotation. |
| d. | The torque caused by some forces may be equal and opposite to that caused by other forces. |
Choose the correct option.
1. (a, c, d)
2. (a, b, d)
3. (a, b, c, d)
4. (b, c, d)
Subtopic: Â Torque |
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NEET 2023 - Target Batch - Aryan Raj Singh
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The figure shows a lamina in XY-plane. Two axes z and z' pass perpendicular to its plane. A force \(\vec{F}\) acts in the plane of the lamina at point P as shown. (The point P is closer to the z'-axis than the z-axis.)
| a. | torque \(\vec{\tau}\) caused by \(\vec{F}\) about z-axis is along - \(\hat{k}\) |
| b. | torque \(\vec{\tau}'\) caused by \(\vec{F}\) about z'-axis is along - \(\hat{k}\) |
| c. | torque caused by \(\vec{F}\) about the z-axis is greater in magnitude than that about the z'-axis |
| d. | total torque is given by \(\vec{\tau}_{net}=\vec{\tau}+\vec{\tau}'\) |
Choose the correct option:
1. (c, d)
2. (a, c)
3. (b, c)
4. (a, b)
Subtopic: Â Torque |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
A uniform cube of mass \(m\) and side \(a\) is placed on a frictionless horizontal surface. A vertical force \(F\) is applied to the edge as shown in the figure. Match the following (most appropriate choice).
| List- I | List- II | ||
| (a) | \(mg/4<F<mg/2\) | (i) | cube will move up. |
| (b) | \(F>mg/2\) | (ii) | cube will not exhibit motion. |
| (c) | \(F>mg\) | (iii) | cube will begin to rotate and slip at A. |
| (d) | \(F=mg/4\) | (iv) | normal reaction effectively at \(a/3\) from A, no motion. |
| 1. | a - (i), b - (iv), c - (ii), d - (iii) |
| 2. | a - (ii), b - (iii), c - (i), d - (iv) |
| 3. | a - (iii), b - (i), c - (ii), d - (iv) |
| 4. | a - (i), b - (ii), c - (iv), d - (iii) |
Subtopic: Â Torque |
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From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
- 1(current)
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