1

JEE Main 2018 (Online) 16th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

Two particles of the same mass m are moving in circular orbits because of force, given by $$F\left( r \right) = {{ - 16} \over r} - {r^3}$$

The first particle is at a distance r = 1, and the second, at r = 4. The best estimate for the ratio of kinetic energies of the first and the second particle is closest to :

The first particle is at a distance r = 1, and the second, at r = 4. The best estimate for the ratio of kinetic energies of the first and the second particle is closest to :

2

JEE Main 2018 (Online) 16th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

A body of mass m starts moving from rest along x-axis so that its velocity varies as $$\upsilon = a\sqrt s $$ where a is a constant and s is the distance covered by the body. The total work done by all the forces acting on the body in the first t seconds after the start of the motion is :

3

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

An object is dropped from a height h from the ground. Every time it hits the ground it looses 50% of its kinetic energy. The total distance covered as t $$ \to $$ $$\infty $$ is :

4

JEE Main 2017 (Offline)

MCQ (Single Correct Answer)

+4

-1

A body of mass m = 10

^{–2}kg is moving in a medium and experiences a frictional force F = –kv^{2}. Its initial speed is v_{0}= 10 ms^{–1}. If, after 10 s, its energy is $${1 \over 8}mv_0^2$$, the value of k will be:Questions Asked from Work Power & Energy (MCQ (Single Correct Answer))

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