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Accelerate JEE 2020: Friction Class 3 (16.10.2019)

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Question 1

A uniform sphere of weight W and radius 5 cm is being held by a string as shown in the figure. The tension in the string will be:

Question 2

From the following, figure find the correct statement.

Question 3

If force F is increasing with time and at t = 0, F = 0, where will slipping first start?

Question 4

In the arrangement shown in the figure, mass of the block B and A is 2 m and m respectively. Surface between B and floor is smooth. The block B is connected to the block C by means of a string pulley system. If the whole system is released, then find the minimum value of mass of block C so that block A remains stationary with respect to B . Co-efficient of friction between A and B is μ.

Question 5

A box ‘A’ is lying on the horizontal floor of the compartment of a train running along horizontal rails from left to right. At time ‘t’, it decelerates. Then the reaction R by the floor on the box is given best by
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Oct 16JEE & BITSAT