Force is the fundamental result of an interaction between two objects , while power is an expression of energy consumed over time (work), of which force is an element. ... Force and power can both be described and measured, but a force is an actual physical phenomenon, and power in itself is not.
Is power is a vector quantity?
Power is defined as the energy (or work) per unit time. Since, time is not considered as a vector quantity, and neither energy or work because the work is not directional. ... So yes, the power is a scalar quantity because it has a unit magnitude but no direction.
power := t – > force(t) * velocity(t); If mass is expressed in kilograms, position in meters, and time in seconds, then force is expressed in Newtons and power in Watts. The function power will tell us the amount of power required at any particular point in time.
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.
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.
Does speed equal power?
Actually though, power is just as dependent upon speed as it is force. It is synonymous with speed-strength or explosive strength, the holy grail amongst those who desire athletic greatness. ... Power is equal to force multiplied by distance divided by time .
What is difference work and power?
Work is defined as the process of energy transfer to the motion of an object through the application of force. ... Power is defined as the amount of energy transferred in unit time. The SI unit of power is the watt. One watt is equal to one joule per second.
Can power be negative?
Power is a signed quantity; negative power just represents power flowing in the opposite direction from positive power . ... This increases the potential energy of the electric charges, so electric power flows out of the component into the circuit.
Is weight a vector or scalar?
Weight is a force which is a vector and has a magnitude and direction. Mass is a scalar.
Is work scalar or vector?
Work is not a vector quantity, but a scalar quantity . This begs the question as to why is a + or – sign used when expressing work? Work which is positive (+) is the result of a force which contributes energy to an object as it does work upon it.
What is average power?
Average power is defined as the ratio of total work done by the body to the total time taken by the body .
What are the 3 equations for power?
P = ΔV 2 / R
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 power factor formula?
Power Triangle and Power Factor Summary
The power factor of an AC circuit is defined as the ratio of the real power (W) consumed by a circuit to the apparent power (VA) consumed by the same circuit. This therefore gives us: Power Factor = Real Power/Apparent Power, or p.f. = W/VA.
What is the difference between speed and power?
Power is the ability to exert as much force as possible in the shortest amount of time. To put it simply, speed + strength = power . When it comes to power, you won't be able to lift as much weight as you would if you were focusing purely on strength. However, you will be lifting at a much higher velocity (speed) rate.
How can I increase my speed and strength?
- The Deadlift. The deadlift is one of the best exercises (in most cases) for improving total body strength, speed, and athleticism. ...
- The Squat. ...
- Sled Drags. ...
- Step-Ups. ...
- Pull-Ups.
