Орал қаласы 2018 жыл

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«Физика пәнін ағылшын тілінде оқып үйрену»

Work=Force*Distance in symbols, W = F * d

Figure 2.25

R  F₁ F₂

Work.

The word “work” in everyday life describes any activity which requires muscular or mental effect. But in physics, the concept “work” has a special meaning. In the scientific sense, it involves motion, and is done when a force changes the position or speed of an object.

Look at figure 4.2 on the left. Work is defined as the product of the force applied upon an object and the distance that the object is moved in the direction of the force. Work can be expressed as a formula:

Work=ForceDistance in symbols, W = F d

Where F is in newtons, and d is in metrs.

From the equation, it can be seen that in the case of zero displacement there will be no work done. Therefore holding up a pair of binoculars, or reading a book are not examples of work, because no motion occurs.

Look at the figure below. When a force of 1 newton acts on an object over a distance of 1 metre, however, the work done is equal to 1 Newton – metre (1 N*m).

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Орал қаласы 2018 жыл

Figure 2.25

Work.

Work=Force*Distance in symbols, W = F * d

Work=ForceDistance in symbols, W = F d