Question # 1

P.E is calculated by a formula :

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Mgh

mg

gh

Nil

Einstein's mass-energy equation is

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E = mc

E = mc2

E = 2mc

E = m2c

The rate of doing work is called :

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Power

Work

Efficiency

None of above

Work done is maximum when angle between force and displacement is:

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45°

0°

60°

90°

Stretched how has type of energy:

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K.E

mgh

P.E

Elastic P.E

Kinetic and potential energy are the kinds of energy:

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Chemical

Nuclear

Light

Mechanical

The kinetic energy of a body of mass 2 kg is 25J, its speed is

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5 ms-1

12.5 ms-1

25 ms-1

50 ms-1

The energy stored in coal is:

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Heat energy

Kinetic energy

Chemical enegy

Nuclear energy

Which of following units is equal to Kgm² s^-2

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Newton

Joule

Watt

Coloumb

Mass-Energy equation was given by:

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Newton

Einstein

Joule

Pascal

Einstein's mass-energy equation relation is:

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E =1/2 mc²

E =mc²

E =m²c

E = 2 mc²

SI unit of work is:

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Joule

Coulomb

Ampere

Kelvin

hp stands for :

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1w

Horse power

Joule

All are true

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