Which is a derived unit? a.) kilogram b.) joule c.) micrometer d.) millimeter
2 answers:
Answer : The correct option is, (b) joule
Explanation :
Derived unit : Derived units are derived from some basic units.
From the given options, option a, c and d are the basics units. While the option b is the derived unit.
The derived unit Joule is the unit of work which is derived as,
The unit of force is newton (N) and 1 N is equal to the
The unit of displacement is meter (m).
Now by putting these units in above formula, we get the unit of work.
Hence, the derived unit is, joule.
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To solve this problem it is necessary to apply the principles of conservation of Energy in order to obtain the final work done.
The electric field in terms of the Force can be expressed as
Where,
F = Force
E= Electric Field
q = Charge
Puesto que el trabajo realizado es equivalente al cambio en la energía cinetica entonces tenemos que
KE = W
KE = F*d
In the First Case,
In Second Case,
The total energy change would be subject to,
Therefore the Kinetic Energy change of the charged object is 27.976J