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JEE 2020: Laws of Motion Quiz - 2 (22.07.2019)

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Question 1

The ratio of period of oscillation of the conical pendulum to that of the simple pendulum is: (Assume the strings are of the same length in the two cases and θ is the angle made by the string with the vertical in case of conical pendulum)

Question 2

A particle is moving in a circle:

Question 3

Which vector in the figures best represents the acceleration of pendulum mass of the intermediate point in its swing?

Question 4

A trolley is accelerating down an incline of angle θ with acceleration gsinθ. Which of the following is correct. (α is the constant angle made by the string with vertical)

Question 5

A block of mass m resting on a wedge of angle θ as shown in the figure. The wedge is given an acceleration a. What is the minimum value of a so that the mass m falls freely?

Question 6

In the figure the reading of the spring balanced will be: [g = 10 m/s2]

Question 7

A pendulum of mass m hangs from a support fixed to a trolley. The direction of the string when the trolley rolls up of plane of inclination α with acceleration a0 is (String and bob remain fixed with respect to trolley)

Question 8

Find the direction of friction forces on block C and D . (Assume all surfaces are rough and all velocities are with respect to ground).

Question 9

With what minimum velocity should block be projected from left end A towards end B such that it reaches the other end B of conveyer belt moving with constant velocity v. Friction coefficient between block and belt is μ.

Question 10

Two masses A and B of 10 kg and 5 kg respectively are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown in figure. The coefficient of friction of A with the table is 0.2 . The minimum mass (in kg) of C that may be placed on A to prevent if from moving is equal to:

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Oct 1JEE & BITSAT