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प्रश्न
A person says that he measured the acceleration of a particle to be non-zero even though no force was acting on the particle.
पर्याय
He is a liar.
His clock might have run slow.
His metre scale might have been longer than the standard.
He might have used a non-inertial frame.
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उत्तर
He might have used a non-inertial frame
If no force is acting on a particle and yet, its acceleration is non-zero, it means the observer is in a non-inertial frame.
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संबंधित प्रश्न
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- What is the force on the particle for t < 0, t > 4 s, 0 < t < 4 s?
- What is the impulse at t = 0 and t = 4 s? (Consider one-dimensional motion only.)
A stone of mass m tied to the end of a string revolves in a vertical circle of radius R. The net forces at the lowest and highest points of the circle directed vertically downwards are: [Choose the correct alternative]
| Lowest Point | Highest Point | |
| a) | mg – T1 | mg + T2 |
| b) | mg + T1 | mg – T2 |
| c) | `mg + T1 –(m_v_1^2)/R` | mg – T2 + (`mv_1^2`)/R |
| d) | `mg – T1 – (mv)/R` | mg + T2 + (mv_1^2)/R |
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Two blocks A and B of mass mA and mB , respectively, are kept in contact on a frictionless table. The experimenter pushes block A from behind, so that the blocks accelerate. If block A exerts force F on block B, what is the force exerted by the experimenter on block A?
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Multiple Choice Question. Select the correct option.
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What do you mean by linear momentum of a body?
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- The particle is acted upon by on impulse of magnitude 4π2 A m at t = 0 s and t = (1/4) s.
- The particle is not acted upon by any force.
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- There is no impulse acting on the particle.
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