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 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 definition of work done in physics?
Work is the measure of energy transfer when a force (F) moves an object through a distance (d). So when work is done, energy has been transferred from one energy store to another, and so: energy transferred = work done. Energy transferred and work done are both measured in joules (J).
What are some examples of work?
Examples: Pushing a car horizontally from rest; shooting a bullet (the powder does the work); walking up stairs; sawing a log.
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 Ke formula?
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
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 unit?
Work is force applied over distance. Work is a mechanical manifestation of energy. The standard unit of work is the joule (J), equivalent to a newton – meter (N · m). This reduces to one kilogram-meter squared per second squared (kg · m 2 /s 2 or kg · m 2 · s –2 ) in base International System of Units (SI) units.
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)
What is the formula of work in physics?
|SI unit||joule (J)|
|Other units||Foot-pound, Erg|
|In SI base units||1 kg⋅m2⋅s−2|
|Derivations from other quantities||W = F ⋅ s W = τ θ|
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.
What is Power example?
Power is defined as the ability to act or have influence over others. An example of power is the strength needed to run five miles. An example of power is the authority a local government has to collect taxes. The number of times a number or expression is multiplied by itself, as shown by an exponent.
What are the three types of work?
There are three types of employment status: employee, worker and self-employed. The three are often not in practice used correctly and the difference is not always known.