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ssc gd 2018 gk question

An empty plastic box of mass m is found to accelerate up at the rate of g/6 when placed deep inside water. How much sand should be put inside the box so that it may accelerate down at the rate of g/6

An empty plastic box of mass m is found to accelerate up at the rate of g/6 when placed deep inside water. How much sand should be put inside the box so that it may accelerate down at the rate of g/6?

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The force of buoyancy exerted by the atmosphere on a balloon is B in the upward direction and remains constant. The force of air resistance on the balloon acts opposite to the direction of the velocity and is proportional to it. The balloon carries a mass M and is found to fall down near the earth,s surface with a constant velocity v. How much mass should be removed from the balloon so that it may rise with a constant velocity v ?

The force of buoyancy exerted by the atmosphere on a balloon is B in the upward direction and remains constant. The force of air resistance on the balloon acts opposite to the direction of the velocity and is proportional to it. The balloon carries a mass M and is found to fall down near the earth,s surface with a constant velocity v. How much mass should be removed from the balloon so that it may rise with a constant velocity v ?

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Suppose the ceiling in the previous problem is that of an elevator which is going up with an acceleration of 2.0 m/s². Find the elongations.

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A block of 2 kg is suspended from the ceiling through a mass-less spring of spring constant k=100 N/m. What is the elongation of the spring ? If another 1 kg is added to the block, what would be the further elongation ?

A block of 2 kg is suspended from the ceiling through a mass-less spring of spring constant k=100 N/m. What is the elongation of the spring ? If another 1 kg is added to the block, what would be the further elongation ?

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Find the reading of the spring balance shown in figure (5-E6). The elevator is going up with an acceleration of g/10, the pulley and the string are light and the pulley is smooth.

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A person is standing on a weighing machine placed on the floor of an elevator. The elevator starts going up with some acceleration, moves with uniform velocity for a while and finally decelerates to stop. The maximum and minimum weights recorded are 72 kg and 60 kg. Assuming that the magnitude of acceleration and deceleration are the same, find (a) true weight of the person and (b) the magnitude of the acceleration. Take g=9.9 m/s².

A person is standing on a weighing machine placed on the floor of an elevator. The elevator starts going up with some acceleration, moves with uniform velocity for a while and finally decelerates to stop. The maximum and minimum weights recorded are 72 kg and 60 kg. Assuming that the magnitude of acceleration and deceleration are the same, find (a) true weight of the person and (b) the magnitude of the acceleration. Take g=9.9 m/s².

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hc verma chapter 5 solution || question no 14 || iitjee 2019 preparation

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A pendulum bob of mass 50 g is suspended from the ceiling of an elevator. Find the tension in the string if the elevator (a) goes up with acceleration 1.2 m/s², (b) goes up with deceleration 1.2 m/s², (c) goes up with uniform velocity, (d) goes down with acceleration 1.2 m/s², (e) goes down with deceleration 1.2 m/s² and (f) goes down with uniform velocity.

A pendulum bob of mass 50 g is suspended from the ceiling of an elevator. Find the tension in the string if the elevator (a) goes up with acceleration 1.2 m/s², (b) goes up with deceleration 1.2 m/s², (c) goes up with uniform velocity, (d) goes down with acceleration 1.2 m/s², (e) goes down with deceleration 1.2 m/s² and (f) goes down with uniform velocity.

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