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A reference frame attached to the Earth

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Important Questions on Newton's Laws of Motion

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JEE Main
IMPORTANT
A particle stays at rest as seen in a frame. We can conclude that
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JEE Main
IMPORTANT
A particle is found to be at rest when seen from a frame S1 and moving with a constant velocity when seen from another frame S2. Mark out the possible options.
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JEE Main
IMPORTANT

The figure shows the displacement of a particle going along the x-axis as a function of time. The force acting on the particle is zero in the region

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IMPORTANT

The following figure shows, a heavy block kept on a frictionless surface and being pulled by two ropes of equal mass m. At t=0, the force on the left rope is withdrawn but the force on the right rope continues to act. Let F1 and F2 be the magnitudes of the forces by the right rope and the left rope on the block, respectively.

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JEE Main
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The force exerted by the floor of an elevator on a standing person's foot is more than the weight of the person. This situation occurs if the elevator is
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JEE Main
IMPORTANT
If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator maybe
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JEE Main
IMPORTANT
A particle is observed from two frames S1 and S2. The frame S2 moves with respect to S1 with an acceleration a. Let F1 and F2 be the pseudo forces on the particle when seen from S1 and S2 respectively. Which of the following are not possible?
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JEE Main
IMPORTANT
A person says that he measured the acceleration of a particle to be non-zero while no force was acting on the particle.