If work is done faster,
power is higher
. If work is done slower, power is smaller. 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.
Does work Affect power?
The point is that for the
same amount of work, power and time are inversely proportional
. The power equation suggests that a more powerful engine can do the same amount of work in less time.
Can you increase your power if you do work quickly?
Power can be calculated from work and time. If you lift a book one meter, you do the same amount of work whether you lift the book quickly or slowly. However,
when you lift the book quickly, you increase your
—the rate at which you do work.
Is work directly proportional to power?
Since work is related to the amount of energy used, then power can be used to express the change of energy during a time interval. … Power is then
directly proportional to the work done
and inversely proportional to the time to do the work.
What is the relation between work done and power?
2 Answers. Work is the energy needed to apply a force to move an object a particular distance, where force is parallel to the displacement.
Power is the rate at which that work is done
.
What are the 3 equations for power?
We now have three equations for electrical power, with two derived from the first using the Ohm’s law equation. These equations are often used in problems involving the computation of power from known values of electric potential difference (ΔV), current (I), and resistance (R).
What is the difference between energy work and power?
Work is referred to as the process of energy that is transferred to an object’s motion by applying force. It is generally represented as the product of
displacement
and force. Power is the amount of energy that is transferred in a unit of time.
Is work done proportional to time?
Power is the rate at which work is performed determined by how long it takes to perform the work. …
Power is then directly proportional to the work done
and inversely proportional to the time to do the work. Remembering that work is force times displacement (W = F*d), you can derive a corollary for the power equation.
What is difference between work and power?
Work is referred to as the process of energy that is transferred to an object’s motion by applying force. It is generally represented as the product of displacement and force. Power is the amount of energy that is transferred in a unit of time. The formula for calculating the force is
Work = Force * Displacement
.
How is power calculated?
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 happen to the energy as work is done?
Work changes the amount of mechanical and internal energy possessed by objects
. When work is done on a system or object, energy is added to it. When work is done by a system or object, it gives some of its energy to something else.
What are the two basic kinds of energy?
- Potential energy.
- Kinetic energy.
Is work equal to energy?
Net work done on an object
equals the object’s change in kinetic energy
. Also called the work-energy principle.
How do you find minimum power?
Use the formula for power: Power = Voltage x Current, or P = VI. If you are trying to calculate the minimum load and you happen to only know the power and voltage ratings of your power supply, you can use the formula
P = V
2
/R
, which can become R = V
2
/P.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as
I = V/R
. The SI unit of current is Ampere (Amp).
