AIEEE 2005 | Work Power & Energy Question 115 | Physics

A body of mass $$m$$ is accelerated uniformly from rest to a speed $$v$$ in a time $$T.$$ The instantaneous power delivered to the body as a function of time is given by

$${{m{v^2}} \over {{T^2}}}.{t^2}$$

$${{m{v^2}} \over {{T^2}}}.t$$

$${1 \over 2}{{m{v^2}} \over {{T^2}}}.{t^2}$$

$${1 \over 2}{{m{v^2}} \over {{T^2}}}.t$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

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

$$x$$

$${e^x}$$

$${x^2}$$

$${\log _e}x$$

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