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JEE 2020: Laws of Motion Quiz - 1 (19.07.2019)

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Question 1

A block of mass M rests on a rough horizontal table. A steadily increasing horizontal force is applied such that the block starts to side on the table without topping. The force is continued even after sliding has starteD. Assume the coefficients of static and kinetic friction between the table and the block to be equal. The correct representation of the variation of the frictional force, f, exerted by the table on the block with time t is given by.

Question 2

A small child tries to move a large rubber toy placed on the ground. The toy does not move but gets deformed under her pushing force () which is obliquely upward as shown. Then

Question 3

A rope of mass 5 kg is hanging between two supports as shown. The tension at the lowest point of the rope is close to (take )

Question 4

Two small metal balls of different mass m1 and m2 are connected by strings of equal length to a fixed point. When the balls are given equal charges, the angles that the two strings make with the vertical are 30 and 60, respectively. The ratio m1/m2 is close to

Question 5

A simple pendulum of length is made to oscillate with an amplitude of 45 degrees. The acceleration due to gravity is . Let T0=2. The time period of oscillation of this pendulum will be

Question 6

A body of mass 2kg rests on a rough inclined plane making an angle 30 º with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is–

Question 7

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

Question 8

Two masses m and 2m are attached to two ends of an ideal spring and the spring is in the compressed state. The energy of spring is 60 joule. If the spring is released, then-

Question 9

For a particle in uniform circular motion, the acceleration at a point P (R, θ) on the circle of radius R is (Here θ is measured from the x–axis)

Question 10

A block of mass m lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q inclined an angle θ to the vertical. The block will remain in limiting equilibrium if the coefficient of friction between it and the surface is –
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Jul 23JEE & BITSAT