New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Work Power and Energy question

2006 · Shift 0 · Q123

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Physics
Work Power and Energy
2006 · Shift 0 · Q123

Work Power and Energy question

2006 · Shift 0 · Q123

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1

A mass of

Mkg

is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of

{45^ \circ }

with the initial vertical direction is

A
$Mg\left( {\sqrt 2 + 1} \right)$
B
$Mg\sqrt 2$
C
${{Mg} \over {\sqrt 2 }}$
D
$Mg\left( {\sqrt 2 - 1} \right)$

More from Work Power and Energy

A ball of mass $0.2 k g$ is thrown vertically upwards by applying a force by hand. If the hand moves $0.2 m$ while applying the force and the ball goes upto $2 m$ height further, find the magnitude of the force. (consider $g = 10 m / s^{2}$ ).2006 · MCQ
A particle of mass $100 g$ is thrown vertically upwards with a speed of $5 m / s$ . The work done by the force of gravity during the time the particle goes up is2006 · MCQ
The potential energy of a $1 k g$ particle free to move along the $x$ -axis is given by $V (x) = (\frac{x ^{4}}{4} - \frac{x ^{2}}{2}) J$ . The total mechanical energy of the particle is $2 J .$ Then, the maximum…2006 · MCQ
A bullet fired into a fixed target loses half of its velocity after penetrating $3 c m .$ How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion?2005 · MCQ
The upper half of an inclined plane with inclination $ϕ$ 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…2005 · MCQ
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 by2005 · MCQ
A spherical ball of mass $20 k g$ is stationary at the top of a hill of height $100 m$ . It rolls down a smooth surface to the ground, then climbs up another hill of height $30 m$ and finally rolls down to a horizontal base at a height of $20 m$ …2005 · MCQ
A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement $x$ is proportional to2004 · MCQ