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Accelerate JEE 2020: Friction Class 1 (05.10.2019)

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Question 1

Three spring balances are attached to the ring as shown in the figure. There is an angle of 90 ° between the balance A and balance B. There is a reading of 5 N on balance A and 12 N on the balance B –

Question 2

A particle is on a smooth horizontal plane. A force F is applied whose F-t graph is given. Then–

Question 3

Consider a car moving on a straight road with a speed of 100 m/s. The distance ( in m) at which car can be stopped is __________. [μ_K = 0.5] (Assume g= 10 ms^-2)

Question 4

A small block of mass m is placed on a bigger block of mass M, which is placed on a horizontal frictionless plane. The two blocks are given equal speeds u, but in opposite directions, as shown in the figure.
$Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-3-New_files\image204.png$
After sometime, it is observed that both the blocks are moving in the direction of motion of the lower block, with a velocity greater than $Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-3-New_files\image205.png$ . It can be concluded that

Question 5

A light spring is compressed and placed horizontally between a vertical fixed wall and a block, free to slide over a smooth horizontal table top as shown in figure. If the system is released from rest, which of the graphs below represents the relation between the acceleration ‘a’ of the block and the distance ‘x’ travelled by it?

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Apr 13JEE & BITSAT