Define: work, power and Energy. State their SI units.....
Answers
WORK:
Work is the energy transferred to or from an object via the application of force along a displacement. ... The SI unit of work is the joule (J), the same unit as for energy.
SI unit: joule (J)
In SI base units: 1 kg⋅m2⋅s−2
Other units: Foot-pound, Erg
Derivations from other quantities: W = F ⋅ s; W = τ θ
POWER:
Power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.
SI unit: watt (W)
In SI base units: kg⋅m2⋅s−3
Derivations from other quantities: P = E/t; P = F·v; P = V·I; P = τ·ω
ENERGY:
Energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. ... The SI unit of energy is the joule, which is the energy transferred to an object by the work of moving it a distance of 1 metre against a force of 1 newton.
SI unit: joule
In SI base units: J = kg m2 s−2
Other units: kW⋅h, BTU, calorie, eV, erg, foot-pound
Explanation:
Work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement. S1 unit is joule
the ability or capacity to do work is energy. SI unit is JOULE
the rate of doing work is power. SI unit is watt