Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 134

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A particle which is constrained to move along the x-axis, is subjected to a force in the same direction which varies with the distance $x$ of the particle from the origin as $F (x) = - k x + a x^{3}$ . Here $k$ and $a$ are positive constants. For $x \geq 0$ , the functional from of the potential energy $U (x)$ of the particle is

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Important Questions on Work, Energy and Power

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 135

A particle of charge

Q

and mass

m

travels through a potential difference

V

from rest. The final momentum of the particle is:

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 136

An electron moving in a electric potential field

V_{1}

enters a higher electric potential field

V_{2},

, then the change in kinetic energy of the electron is proportional to:-

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 138

In a crystal the atoms are located at the position of ________.

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 139

A solid cylinder

30 cm

in diameter at the top of an inclined plane

2.0 m

high is released and rolls down the incline without loss of energy due to friction. Its linear speed at the bottom is:

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 140

A plank $P$ is placed on a solid cylinder $S$ , which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of the kinetic energy of $P$ to the kinetic energy of $S$ is

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 141

The velocity of centre of mass of a disc rolling on an inclined plane changes from

V

to

2 V

at any instant of time. If

M

is the mass of disc then increases in its kinetic energy will be

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 142

A uniform thin ring of mass

0.4 kg

rolls without slipping on a horizontal surface with a linear velocity of

10 cm / s

. The kinetic energy of the ring is :

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 143

The velocity of simple pendulum is maximum at