ï»¿ The potential energy of a 1 kg particle free move along the x-axis is given by The total mechanical energy of the particle 2 J. Then, the maximum speed (in m/s) is from Physics Work, Energy and Power Class 11 Manipur Board

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The potential energy of a 1 kg particle free move along the x-axis is given by

The total mechanical energy of the particle 2 J. Then, the maximum speed (in m/s) is

• 2

B.

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Define the unit joule.

Work done is said to be one joule if one newton of Â force displaces the body through a distance of one meter in the direction of applied Â forceÂ .
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What are different units of energy?

The different units of energy are :

(i) Joule Â  Â  Â  Â  Â  Â
(ii) Erg
(iii) eV Â  Â  Â  Â  Â  Â
(iv) KWh
(v) Calorie.

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What is watt?

SI unit of power is Watt.Â
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Define watt.

Power is said to be one watt if one joule of work is done in one second.Â
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Is work a scalar or a vector quantity?

Work is dot product of two vectors. i.e.Â .

And dot product is a scalar quantity. Therefore, work is a scalar quantity.Â
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