Similar JEE Doubts

• Put a uniform meter scale horizontally on your extended index fingers with ... morethe left one at 0.00 cm and the right one at 90.00 cm. When you attempt to move both the fingers slowly towards the center, initially only the left finger slips with respect to the scale and the right finger does not. After some distance, the left finger stops and the right one starts slipping. Then the right finger stops at a distance ��R from the center (50.00 cm) of the scale and the left one starts slipping again. This happens because of the difference in the frictional forces on the two fingers. If the coefficients of static and dynamic friction between the fingers and the scale are 0.40 and 0.32, respectively, the value of ��R (in cm) is ______.- Correct answer is '25.60'. Can you explain this answer?

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• SECTION-IV (Total Marks : 28)(Integer Answer Typ e)This section contains 7 ... morequestions. The answer to each of the questions is a single digit integer, ranging from 0 to 9.Enter only the numerical value in the space provided below.Q. A boy is pushing a ring of mass 2 kg and radius 0.5 m with a stick asshown in the figure. The stick applies a force of 2N on the ring and rolls itwithout slipping with an acceleration of 0.3 m/s2. The coefficient offriction between the ground and the ring is large enough that rollingalways occurs and the coefficeint of friction between the stick and the ringis (P/10). The value of P is Correct answer is '4'. Can you explain this answer?

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• Put a uniform meter scale horizontally on your extended index fingers with ... morethe left one at 0.00 cm and the right one at 90.00 cm. When you attempt to move both the fingers slowly towards the center, initially only the left finger slips with respect to the scale and the right finger does not. After some distance, the left finger stops and the right one starts slipping. Then the right finger stops at a distance xR from the center (50.00 cm) of the scale and the left one starts slipping again. This happens because of the difference in the frictional forces on the two fingers. If the coefficients of static and dynamic friction between the fingers and the scale are 0.40 and 0.32, respectively, the value of xR (in cm) is ______.- Correct answer is '25.60'. Can you explain this answer?

• A block is moving on an inclined plane making an angle 45° with the hor... moreizontal and the coefficient offriction is m. The force required to just push it up the inclined plane is 3 times the force required to justprevent it from sliding down. If we define N = 10 μ, then N is Correct answer is '5'. Can you explain this answer?

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• A ring rolls on a horizontal surface without sliding. The velocity of its c... moreenter is v. It encounters a step of height 0.3R, where R is the radius of the ring. Calculate the angular velocity (in rad/s) of the ring just after the impact. Assume that the ring does not return back and there is sufficient friction to avoid slipping. Take v = 100 cm/s, R = 17 cm. Correct answer is '5'. Can you explain this answer?

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