Scientists define power as the rate at which work is done, or the rate at which energy is expended. In words: Power is the amount of work done divided by the time it takes to do that work.
Which term is the rate at which work is done quizlet?
The rate in which work is done is called energy .
Is energy the rate at which work is done?
The rate of doing work is equal to the rate of using energy since the force transfers one unit of energy when it does one unit of work. A horsepower is equal to 550 ft lb/s, and a kilowatt is 1000 watts.
What is the unit of the rate that work is done or that energy is converted from one form to another )?
The standard unit used to measure energy and work done in physics is the joule , which has the symbol J. In mechanics, 1 joule is the energy transferred when a force of 1 Newton is applied to an object and moves it through a distance of 1 meter.
What is the ability to do work called?
Energy and Work Energy is the capacity to do work or to produce heat. Internal energy is the sum of kinetic energy and the potential energy.
What is the scientific definition of work quizlet?
Work is when you exert a force on an object that causes the object to move some distance . ... A force must be applied to the object and the object must move at least partly in the direction in which the force is applied.
Which of the following is the rate at which energy is transferred?
The rate at which energy is transferred is called power .
What is work done in physics?
work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. ... If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ .
Is energy the same as work done?
Work done has the same units as energy – joules . ... You do not have to do work if you have energy though (potential energy does not do work). Specifically, a person could not push the box (and so do work) in the example above without energy. Work done is equal to energy transferred.
In which situation is work done?
Work is said to be done when displacement takes place in the direction of force . When the force makes an angle with the direction of force the component of force along the direction of displacement is taken. If the force is perpendicular to the direction of displacement, work done is zero.
What is the unit of the rate that work is done or that energy is converted from one form to another )? Chegg?
Power is the pace at which we do work or in other words rate at which energy is transferred or used. The SI unit of energy is the same as work, that is, joule (J) . The SI unit of power is watt (W) and is equal to joules per second (J / s).
What is a SI unit of work?
The SI unit of work is the joule (J) , the same unit as for energy.
How do you find the rate of work done?
To calculate work done in a given time in general if a person A completes a piece of work in a ‘n’ days, then A’s one day work = 1/n . If a man takes 10 days to complete a piece of work, then according to the unitary method work done in one day = 1/10.
Whats the best way to define work?
Definition of work (Entry 2 of 3) 1 : activity in which one exerts strength or faculties to do or perform something : a : activity that a person engages in regularly to earn a livelihood people looking for work. b : a specific task, duty, function, or assignment often being a part or phase of some larger activity.
What is the scientific definition of power quizlet?
Scientific Definition. Power is the rate (energy amount per time period) at which work is done or energy converted . The scientific unit of power is the watt (W), which is equal to one joule (energy amount) per second (time period).
What is the work done by time?
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).
What is the rate at which electric energy is transferred by an electric current called?
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 work done in 9th physics?
Work done on an object is defined as the magnitude of the force multiplied by the distance moved by the object in the direction of the applied force .
What is transfer of energy called?
Transfer of energy may refer to: Energy transformation , Energy transformation, also known as energy conversion, is the process of changing energy from one form to another. Heat transfer, the exchange of thermal energy via conduction, convection and radiation.
What is the definition of energy transfer?
capacity to do work. energy transfer. Noun. The conversion of one form of energy into another, or the movement of energy from one place to another . energy transformation.
What is work done measured in?
work done (W) is measured in joules (J) force (F) is measured in newtons (N) distance (d) is in the same direction as the force and is measured in metres (m)
What is work done class 11?
When a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force. Work done by the force is equal to the product of the force and the displacement of the object in the direction of force .
What happens to the energy as work is done?
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. ... By applying a force on the ball over this distance, the hand is doing work on the ball, and the ball gains kinetic energy. This is what gives it speed.
What is work done GCSE physics?
Work done is defined as the amount of force needed to move an object a certain distance . In essence, it is a measure of an energy transferred to or from an object which allows it to be moved.
What is work done Brainly?
Answer: When a force acts on the body and body displaces in the direction or opposite to the direction of force , work is said to be done.
Which of the following is definition of work?
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 do you find the rate?
Use the formula r = d/t . Your rate is 24 miles divided by 2 hours, so: r = 24 miles ÷ 2 hours = 12 miles per hour.
Is defined as a power rating of 550 ft lb s?
It was originally defined as 550 foot-pounds per second (ft-lb/s). A power level of 1 hp is approximately equivalent to 746 watt s (W) or 0.746 kilowatt s (kW). To convert from horsepower to watts, multiply by 746. To convert from watts to horsepower, multiply by 0.00134.
What ratio can you use to relate the efficiency of a machine to its mechanical advantage?
What ratio can you use to relate the efficiency of a machine to its mechanical advantage? Efficiency equals the ratio of actual mechanical advantage to theoretical mechanical advantage . The length of an incline is 8 m. The height of the elevated end is 2 m.
Which of the following is needed for work to be done?
There are three key ingredients to work – force, displacement, and cause. In order for a force to qualify as having done work on an object, there must be a displacement and the force must cause the displacement .
What is a working rate?
noun. 1 The rate at which work is done . 2An amount paid for work done.
What variable has the greatest effect on the kinetic energy of an object?
The two main factors that affect kinetic energy are mass and speed . Why? Because the motion of an object depends on how fast it’s traveling, but also how much mass it has, though velocity is the more important factor.
What is the thermodynamic definition of work?
In thermodynamics, thermodynamic work is the quantity of energy transferred from one system to another . It is a generalization of the concept of mechanical work in mechanics. In the SI system of measurement, work is measured in joules (symbol: J). The rate at which work is performed is power.
What is the best way to define work quizlet?
When you exert a force on an object that causes the object to move some distance. ~ When the object moves in the same direction in which the force is exerted. Amount of work done on an object= Force × Distance .
What is the definition of work in chemistry?
In physical science, such as physics and chemistry, work is force multiplied by distance . Work occurs if there is movement in the direction of the force. The SI unit of work is the joule (J). This is the work expended by a force of one newton (N) over a displacement of one meter (m).
