1

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

A spring whose unstretched length is l has a force constant k. The spring is cut into two pieces of unstretched
lengths l

_{1}and l_{2}where, l_{1}= nl_{2}and n is an integer. The ratio k_{1}/k_{2}of the corresponding force constant, k_{1}and k_{2}will be :2

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

A bullet of mass 20 g has an initial speed of 1 ms

^{–1}, just before it starts penetrating a mud wall of thickness 20 cm. If the wall offers a mean resistance of 2.5 × 10^{–2}N, the speed of the bullet after emerging from the other side of the wall is close to :3

JEE Main 2019 (Online) 10th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Two blocks A and B of masses m

[Take g = 10 m/s

_{A }= 1 kg and m_{B }= 3 kg are kept on the table as shown in figure. The coefficient of friction between A and B is 0.2 and between B and the surface of the table is also 0.2. The maximum force F that can be applied on B horizontally, so that the block A does not slide over the block B is :[Take g = 10 m/s

^{2}]4

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

A ball is thrown upward with an initial velocity
V

_{0}from the surface of the earth. The motion of the ball is affected by a drag force equal to m$$\gamma $$u^{2}(where m is mass of the ball, u is its instantaneous velocity and $$\gamma $$ is a constant). Time taken by the ball to rise to its zenith is :Questions Asked from Laws of Motion (MCQ (Single Correct Answer))

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