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.
What is meant by work done definition?
The work done by a force can be defined as the product of the displacement of an object and the component of the applied force which is in the direction of the object’s displacement.
What is work done answer?
Answer: When a force is applied on a body and displacement happens in the body along the direction of the force applied, we say that work is done.
What is work done formula?
Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as W = f. d cos θ.
What is work done class 9?
Class IX Science Work Done. • 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. Work done = force × distance.
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 is work done in thermodynamics?
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.
Why do we say work is done?
Work is done whenever the given conditions are satisfied: A force acts on the body. There is a displacement of the body caused by the applied force along the direction of the applied force.
What is difference between work and work done?
There is strong connection between work and energy, in a sense that when there is a net force doing work on an object, the object’s kinetic energy will change by an amount equal to the work done: note that the work in this equation is the work done by the net force, rather than the work done by an individual force.
How do you find the work done in physics?
Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.
How do you find work done in physics?
Example
What is work done write its types?
Work: In physics work is said to be done when a force acting on a body displaces it through a certain distance. As work is the dot or scalar product of two vectors (force and displacement), therefore, it is a scalar quantity. Special cases: CaseI: When the body moves in the direction of the force.
Why do we say that work is done class 9th?
1. When do we say that work is done? Answer: Work is said to be done whenever a force acts on a body and there is a displacement of the body caused by the applied force along the direction of the applied force.
What does work and power mean?
Work is defined as the process of energy transfer to the motion of an object through the application of force. The SI unit of work is Joule. 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.
Why work done is scalar quantity?
Work is a scalar quantity because it is the dot product of two vectors (Force and displacement). Dot product of two vectors becomes scalar quantity. So, work done has only magnitude but not direction. Work done may be positive, negative or zero.
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