What are the formulas for work and power?
That equation is:Work = Force • Displacement • Cosine(theta)W = F • d • cos(theta)Power = Work / time.P = W / t.P = F • cos(theta) • (d/t)P = F • v • cos(theta)PEgrav = m•g•h.KE = 0.5 • m • v2
What is the symbol equation for work done?
Work done is measured in joules (which has symbol J). So if we have a constant force of magnitude F newtons, which moves a body a distance s (meters) along a flat surface, the work done is F × s joules.
What is a unit of work?
In the case of work (and also energy), the standard metric unit is the Joule (abbreviated J). One Joule is equivalent to one Newton of force causing a displacement of one meter. In other words, The Joule is the unit of work.
What is the meaning of work in physics?
Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
What is power formula?
or. P = W / t. The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second.
What is the equation for energy?
The formula that links energy and power is: Energy = Power x Time. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.
How is work done measured?
work done is measured in joules (J) force is measured in newtons (N) distance moved along the line of action of the force is measured in metres (m)
How do you calculate work per second?
Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.
What is the efficiency formula?
Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.
What is SI unit of power?
Power (P) is the rate at which energy is transferred or converted. Thus, power equals work divided by time (P = W / t). The SI unit of power is the watt (W), in honor of Scottish inventor James Watt (1736 – 1819).
Which is not unit of work?
What is work and its SI unit?
In physics, 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).
What are the types of work in physics?
Work and energy (Class 9 CBSE)Introduction.Work.Positive Work.Negative Work.Case of zero work done.Displacement at an angle to the force.Energy.Kinetic Energy.
What is work and its types?
Work is said to be done when a force acting on a body displaces it through a certain distance. Work done by a force is positive when the force acts in the same direction as that of displacement. Eg.