Conditions When No Work is DoneĪs work depends on three factors, i.e., force applied on the object, displacement travelled by the body under the force, and an angle between force and displacement, there are three cases when it is called that there is no work done during the situation.įor example, a weightlifter holding a 150 kg weight for 30 sec on his shoulder does ‘no work’ on the load during this time.įor example, a ball rolling on a slippery surface is not acted upon by the horizontal force, as there is no friction. Īlthough force and displacement both are vector quantities, work has no direction as it is the scalar product of both vector quantities. Here, W = work done, F = force applied, d = displacement or distance with direction, and □ = angle between the force and displacement.Īs work done is a physical quantity, in terms of vector, it is written asġ Joule = 1 Newton x 1 metre, i.e., J = Nm = kg m/sec 2. Work done on a body is defined as the product of the force’s magnitude and the distance the body moves in the applied force’s direction. Mathematical Form to Define Work in Physics Hence, in such cases, it is concluded that there is no work done. But this work is under gravity, which lets the object fall downward. While in the second case, in terms of Physics, there is a change in the position of an object, which means work has been done. In the first case, a man is only tiring himself by pushing the rigid wall as there is no change in the position of the brick wall after applying a lot of force. In some cases, like a man pushing a rigid brick wall, falling any object freely from a certain height due to gravity, etc., are not considered as possessing the ability to do work in Physics. ![]() ![]() Hence, work is done whenever a displacement occurs in the object’s position. In all these cases, the movement of objects occurs. A batsman hitting a ball, a boat sailing in the river, a cyclist paddling the cycle, a mechanic repairing a gadget, a traveller pushing her luggage from the airport, cobbler polishing shoes, etc. You face a lot of examples of work in your daily life. You can also define work in Physics as the transfer of energy to or from an object by exerting force along with the displacement. Work has only magnitude and no direction. Simply put, work in Physics is the multiplicative product of force and displacement acting on the same body, or you can say that it is an approach of force over a certain distance. Work in Physics is defined as the product of the component of the force in the direction of the displacement and the magnitude of this displacement. Work is the connection between force and displacement. In the Physics language, the answer to the same question, ‘what is work,’ has a different meaning. are some common examples where the subjects are performing work. A student is learning his course for the upcoming exams a musician is playing the flute a businessman is thinking of a meticulous plan for his business deal a child is riding a bicycle on the circular path in the park every day, etc. ![]() Work is a person’s function, duty, assignment, or special task. The question ‘what is work’ in general language can be defined as an activity in which one exerts physical or mental strength or performs something. The word work contains a dictionary meaning ‘to do something which needs physical or mental efforts, to earn money or to achieve something.’ The job you do, especially to earn money, is called work. This article aims to develop the understanding of a physical quantity called work in Physics. And what is work in Physics? This article will explain it to you. A teacher teaching in the class, a student doing his homework, a farmer ploughing his fields, a driver driving a car, an artist drawing a beautiful painting, a photographer clicking photos, etc., all are said to be working.īut, have you ever thought that Science has another perspective for the term ‘Work?’ Yes! This word, work in Physics, conversely has a definite and precise meaning. The word work is generally one that every one of you frequently uses in your daily life.
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