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प्रश्न
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
पर्याय
0.25 rad s–2
25 rad s–2
5 m s–2
25 m s–2
उत्तर
25 rad s–2
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संबंधित प्रश्न
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Choose the correct alternatives:
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- For a rotational motion about a fixed axis, angular momentum L and angular velocity ω are always parallel.
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- Angular momentum l2 of particle 2 about A is l2 = mvr2
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⊗ represents a unit vector coming out of the page.
⊗ represents a unit vector going into the page.
The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it?
- The forces may be acting radially from a point on the axis.
- The forces may be acting on the axis of rotation.
- The forces may be acting parallel to the axis of rotation.
- The torque caused by some forces may be equal and opposite to that caused by other forces.
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