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## Previous Year Papers

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Class 10 Class 12

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.

349 Views

Is work a scalar or a vector quantity?

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

And dot product is a scalar quantity. Therefore, work is a scalar quantity.
1450 Views

What are different units of energy?

The different units of energy are :

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

804 Views

What is watt?

SI unit of power is Watt.
773 Views

Define watt.

Power is said to be one watt if one joule of work is done in one second.
860 Views

Define the unit joule.

Work done is said to be one joule if one newton of  force displaces the body through a distance of one meter in the direction of applied  force .
799 Views