Chapter 7: Q1 CQ (page 258)

Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work.

Short Answer

Expert verified

The only useful illustration is the fact that a cyclist travelling in a circle has zero net displacement. In this case, muscular energy is converted into kinetic energy. There hasn't been any scientific research done in this situation. However, because work is done in broad strokes, energy changes.

Step by step solution

Understanding force, displacement and work.

Force displacement and work have a relationship that is

$W = F \cdot d W = F d \cos θ$

Here, F is the force, d is the distance, θ is the angle force and displacement and W is the work.

Evaluating the expression.

The aforementioned statement demonstrates how three variables affect work: displacement, force, and the angle between displacement and force. When force is applied to an item but no displacement results, there was no work accomplished by the force.

Example.

For example, the net displacement of a cyclist travelling along a circled path is zero. Therefore, the task completed is also nil. In this instance, kinetic energy is created from muscular energy. In this case, there has been no scientific work done. Nonetheless, work is carried out in broad strokes, which causes energy to alter.