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Mechanical power refers to the rate at which work can be done. It is a power output, as opposed to a power input (see Figure 1). The power input is referring to how fast the fuel's energy is converted to power to use for the car. In contrast, the power output, is how fast the engine can do work, when receiving the power from the fuel.
- Mechanical Advantage
Mechanical advantage is a measure of the ratio of output...
- Mechanical Advantage
Dec 22, 2020 · About the Author. Mechanical power is a measure of the rate at which work is performed or energy is transferred within mechanical systems. The expression for mechanical power uses the same basic formula as all types of power: P = W / t where P is power in watts, W is work in joules and t is time in seconds.
Difference Between Mechanical and Electrical Power. While mechanical power refers to the rate at which work can be done, electrical power is the rate at which an electric circuit transfers electrical energy. An electric motor's input power is provided by electrical power, while the output power is mechanical so that it causes the car to move.
- Definitions of Power
- Mechanical Power
- Electrical Power
- So What Is The difference?
- Units of Power
- Conclusion
Power is the rate of work done or work done per unit time or energy converted per unit time. Now though the basic concept remains the same, the expressions of power differs in electrical and mechanical engineering because the expression of the work done or energy conversionis different in the two disciplines.
Mechanical power (P) is typically expressed by the work done (W) (if expressed in Foot-pound) divided by the time (t) (if expressed in Second).
The electrical power (P) is expressed by current ( I ) _(_in Amps) and voltage (V) (in volts)as below:
The mechanical power is measured by the rate at which work is done. On the other hand, electrical power is measured by the rate at which electrical energy is transformed.In terms of the power generation, mechanical power is generated by the mechanical equipment like piston-cylinders, turbines, etc and the electrical power is generated by alternators.In SI method, the unit of work done is Joules, so, Joules per second or Wattis the SI unit of the power. Kilowatts (103) and megawatt (106) are used for expressing power in higher power.In CGS systems the unit of work is Ergs, so, Ergs per secondis the unit of power in this system.In FPS method, the power is represented by Foot Pounds per secondas the unit of work done in FPS is Foot pound.Horse Power is another widely used unit in industry. One horse Powerequals to 550 foot pound per second and is approximately equals to 746 Watts.The concept of power is same in the context of mechanical as well as electrical engineering applications. The unit Kw is an electrical as well as mechanical power unit. Though the basic concepts remain the same, the form of the governing equations in case of the mechanical power is different than that of electrical power. Moreover, in mechanical en...
The dimension of power is energy divided by time. In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second. Other common and traditional measures are horsepower (hp), comparing to the power of a horse; one mechanical horsepower equals about 745.7 watts.
Mechanical power is the rate at which work is done or energy is transferred in a mechanical system. It quantifies how quickly energy is converted from one form to another, often measured in watts (W), which is equivalent to one joule per second. This concept is crucial for understanding how machines and engines perform tasks, emphasizing the relationship between force, distance, and time.
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Episode 218: Mechanical power. Practical Activity for 16-19. Activity time 60 minutes. Level Advanced. Power is the rate at which work is done, i.e. the rate at which energy is transferred by a force. It is likely that your students will be familiar with this definition. They may also have studied power in an electrical context.
