Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 9

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Two bodies of masses $m_{1}$ and $m_{2}$ have same momentum. The ratio of their $K E$ is

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Important Questions on Work, Energy and Power

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 10

K E

Of a body is increased by

44 % .

What is the percent increase in the momentum?

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 11

When momentum of a body increases by

200 %,

its

K E

increases by

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 12

Two bodies of masses

m_{1}

and

m_{2}

are moving with same kinetic energy. If

P_{1}

and

P_{2}

are their respective momentum, the ratio

\frac{P_{1}}{P_{2}}

is equal to

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 13

A particle moves along

x

-axis from

x = 0

to

x = 5

metre under the influence of a force

F = 7 - 2 x + 3 x^{2} .

The work done in the process is

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 14

Under the action of a force, a

2 kg

body moves such that its position

x

as a function of time

t

is given by

x = \frac{t^{3}}{3},

where

x

is in metre and

t

in second. The work done by the force in the first two seconds is

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 15

A particle of mass

2 kg

travels along a straight line with velocity

k = a \sqrt{x},

where

a

is a constant. The work done by net force during the displacement of particle from

x = 0

to

x = 4 m

is

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 16

The position

x

of a particle moving along

x

-axis at time

(t)

is given by the equation

t = \sqrt{x} + 2,

where

x

is in meters and

t

in seconds. Find the work done by the force in first four seconds.

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 17

K . E .

acquired by a mass

m

in travelling a certain distance

d,

starting from rest, under the action of a constant force is