Power is a rate at which work is done, or energy is used. It is equal to the amount of work done divided by the time it takes to do the work. The unit of power is the Watt (W), which is equal to a Joule per second (J/s).
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What is power equal to in physics?
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.
How do you calculate power?
Power is equal to work divided by time. In this example, P = 9000 J /60 s = 150 W . You can also use our power calculator to find work – simply insert the values of power and time.
Is power equal to force?
In calculus terms, power is the derivative of work with respect to time.Since work is force times displacement (W=F*d), and velocity is displacement over time (v=d/t), power equals force times velocity: P = F*v. More power is seen when the system is both strong in force and fast in velocity.
What are the 2 equations for power?
Power Formula 2 – Mechanical power equation: Power P = E ⁄ t where power P is in watts, Power P = work / time (W ⁄ t). Energy E is in joules, and time t is in seconds.
What is power explain?
In physics, 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.
What do you understand by power?
ability to do or act; capability of doing or accomplishing something. political or national strength: the balance of power in Europe. great or marked ability to do or act; strength; might; force. the possession of control or command over people; authority; ascendancy: Words have tremendous power over our minds.
What’s the unit of power?
WattPower (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).
What is power in terms of electricity?
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
What is power write its formula?
Power Formula. Power is a rate at which work is done, or energy is used. It is equal to the amount of work done divided by the time it takes to do the work. The unit of power is the Watt (W), which is equal to a Joule per second (J/s). P = power (W, or J/s)
Does power equal voltage times current?
Electrical power is the product of voltage and current. P=VXI.
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 definition of power is operating electrically or having strength or force.
Why is power equals to current times potential difference?
A battery can deliver energy, or a circuit element like a resistor can release energy as heat. For any circuit element, the power is equal to the voltage difference across the element multiplied by the current. By Ohm’s Law, V = IR, and so there are additional forms of the electric power formula for resistors.
How do you calculate power in watts?
The formula for calculating wattage is: W (joules per second) = V (joules per coulomb) x A (coulombs per second) where W is watts, V is volts, and A is amperes of current. In practical terms, wattage is the power produced or used per second. For example, a 60-watt light bulb uses 60 joules per second.
How do you determine Watts?
The number of watts is equal to amps multiplied by volts. That’s it! In other words, watt=amp X volt. Sometimes you will see this formula written as W=A X V.
What does power mean in math?
The power of a number says how many times to use the number in a multiplication. Powers are also called Exponents or Indices. For example, 8^2 could be called “8 to the power 2” or “8 to the second power”, or simply “8 squared”.
What is power in 10th class?
power is defined as the rate of doing work. power is measured in watt which is equal to jule per second. power can also measure as the product of force and velocity of an object. electric power is defined as the rate of doing work by electricity.
What is power and work?
Work is the displacement of an object when a force (push or pull) is applied to it. We define the capacity to do the work as energy. Power is the work done per unit of time.
What is the main purpose of power?
Power is the capacity to cause change, produce effects on others or potentially influence others (PSU WC, L. 7.). Power is the function of a relationship because it belongs not only to the leader, but also to the followers and the situation.
What is power in Brainly?
Brainly User. Explanation: Power is defined as the ability to act or have influence over others.
What is power in sociology?
Sociologists examine government and politics in terms of their impact on individuals and larger social systems. Power is an entity or individual’s ability to control or direct others, while authority is influence that is predicated on perceived legitimacy.