Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 64

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Figure shows a particle sliding on a frictionless track which terminates in a straight horizontal section. If the particle starts slipping from the point A, how far away from the track will the particle hit the ground ?

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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 65

Two springs

A

and

B

(k_{A} = 2 k_{B})

are stretched by applying forces of equal magnitudes at the four ends. If the energy stored in

A

is

E

, then that in

B

is

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 66

A stone is projected vertically up with a velocity

u

reaches upto a maximum height

h

. When it is at a height of

\frac{3 h}{4}

from the ground, the ratio of

KE

and

PE

at that point is: (consider

PE = 0

at the point of projection)

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 67

A body is dropped from a certain height. When it loses

U

amount of its potential energy it acquires a velocity

v

. The mass of the body is

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 68

You lift a heavy book from the floor of the room and keep it in the book-shelf having a height

2 m

. In this process you take

5 seconds

. The work done by you will depend upon

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 69

The potential energy of a system is represented in the first figure, the force acting on the system will be represented by

Question Image

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 70

Which of the following graphs is correct between kinetic energy

(E),

potential energy

(U)

and height

(h)

from the ground of the particle (

h < < R_{E}

and

U = 0

at

h = 0

)

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 71

The graph between

\sqrt{E}

and

\frac{1}{p}

is (

E

=kinetic energy and p = momentum)

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Alpha Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise-1>Q 72

A particle is projected at

60 °

to the horizóntal with a kinetic energy

K .

The kinetic energy at the highest point is