JEE Advanced 2017 Paper 1 Offline | Work Power & Energy Question 7 | Physics

JEE Advanced 2017 Paper 1 Offline

MCQ (More than One Correct Answer)

-1

A flat plate is moving normal to its plane through a gas under the reaction of a constant force $$F.$$ The gas is kept at a very low pressure. The speed of the plate $$v$$ is much less than the average speed u of the gas molecules.

Which of the following options is /are true?

The pressure difference between the leading and trailing faces of the plate is proportional to uv

The resistive force experimenced by the plate is proportional to $$v$$

The plate will continue to move with constant non-zero acceleration, at all times

At a later time the external force $$F$$ balances the resistive force

IIT-JEE 2011 Paper 2 Offline

MCQ (More than One Correct Answer)

-2

A thin ring of mass 2 kg and radius 0.5 m is rolling without on a horizontal plane with velocity 1 m/s. A small ball of mass 0.1 kg, moving with velocity 20 m/s in the opposite direction hits the ring at a height of 0.75 m and goes vertically up with velocity 10 m/s. Immediately after the collision,

IIT-JEE 2011 Paper 2 Offline Physics - Work Power & Energy Question 9 English

the ring has pure rotation about its stationary CM.

the ring comes to a complete stop.

friction between the ring and the ground is to the left.

there is no friction between the ring and the ground.

IIT-JEE 2006

MCQ (More than One Correct Answer)

-1

A ball moves over a fixed track as shown in the figure. From $A$ to $B$, the ball rolls without slipping. Surface $B C$ is frictionless. $K_A, K_B$ and $K_c$ are kinetic energies of the ball at $A, B$ and C , respectively. Then

IIT-JEE 2006 Physics - Work Power & Energy Question 2 English

$h_{\mathrm{A}}>h_{\mathrm{c}^{\prime}} \mathrm{K}_{\mathrm{B}}>\mathrm{K}_{\mathrm{C}}$.

$h_{\mathrm{A}}>h_{\mathrm{c}} ; \mathrm{K}_{\mathrm{C}}>\mathrm{K}_{\mathrm{A}}$.

$h_{\mathrm{A}}=h_{\mathrm{c}} ; \mathrm{K}_{\mathrm{B}}=\mathrm{K}_{\mathrm{C}}$.

$h_{\mathrm{A}} < h_{\mathrm{c}} ; \mathrm{K}_{\mathrm{B}}>\mathrm{K}_{\mathrm{C}}$.

IIT-JEE 1998 Screening

MCQ (More than One Correct Answer)

-0.5

A force $$F = - K\left( {y\widehat i + x\widehat j} \right)$$ (where K is a positive constant) acts on a particle moving in the xy plane. Starting from the origin, the particle is taken along the positive x axis to the point $$\left( {a,0} \right)$$, and then parallel to the y axis to the point $$\left( {a,a} \right)$$. The total work done by the force F on the particle is

$$ - 2K{a^2}$$

$$2K{a^2}$$

$$ - K{a^2}$$

$$K{a^2}$$

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