AIEEE 2005 | Work Power & Energy Question 131 | Physics

The upper half of an inclined plane with inclination $$\phi $$ is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by

$$2\,\cos \,\,\phi $$

$$2\,sin\,\,\phi $$

$$\,\tan \,\,\phi $$

$$2\,\tan \,\,\phi $$

AIEEE 2004

MCQ (Single Correct Answer)

-1

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle, the motion of the particles takes place in a plane. It follows that

its kinetic energy is constant

is acceleration is constant

its velocity is constant

it moves in a straight line

AIEEE 2004

MCQ (Single Correct Answer)

-1

A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement $$x$$ is proportional to

$$x$$

$${e^x}$$

$${x^2}$$

$${\log _e}x$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

A uniform chain of length $$2$$ $$m$$ is kept on a table such that a length of $$60$$ $$cm$$ hangs freely from the edge of the table. The total mass of the chain is $$4$$ $$kg.$$ What is the work done in pulling the entire chain on the table?

$$12$$ $$J$$

$$3.6$$ $$J$$

$$7.2$$ $$J$$

$$1200$$ $$J$$

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