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Accelerate NEET 2020: Rotational Motion Class 1 (06.09.2019)

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Question 1

A light rod of length l has two masses m1 and m2 attached to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the centre of mass is

Question 2

Consider the situation shown in figure A spring of spring constant 400 N/m is attached at one end to a wedge fixed rigidly with the horizontal part. A 40 g mass is released form rest while situated at a height 5 m the curved track. The minimum deformation in the spring is nearly equal to

Question 3

A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is :

Question 4

The ratio of the acceleration for a solid sphere (mass 'm' and radius 'R') rolling down an incline of angle 'θ' without slipping and slipping down the incline without rolling is :

Question 5

Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.
Assertion (A) A ladder is more apt to slip, when you are high up on it, then when you just begin to climb.
Reason (R) At the high up on a ladder, the torque is large and on climbing up the torque is small.
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