Question

which of the following is the best explanation of work

A: Work occurs when a force acts on an object

B: Work occurs when a force acts on an object and causes the displacement of that object

C: Work occurs when force acts to hold an object in place

D: Work occurs when energy acts on an object

Answer 1

Of the four choices listed, the best explanation of work  is

(B): "Work occurs when a force acts on an object and causes the displacement of that object"

Answer 2

The best explanation of work is that work occurs when a force acts on an object and causes the displacement of that object.

We can calculate the work (W) done by a force on an object using the following expression.

$W = F\ d\ cos\theta$

where,

• F: force applied
• d: displacement of the object
• θ: angle between F and d

Which of the following is the best explanation of work?

• A: Work occurs when a force acts on an object. NO. This is not enough, it is also necessary that the object moves.
• B: Work occurs when a force acts on an object and causes the displacement of that object. YES.
• C: Work occurs when force acts to hold an object in place. NO. it is necessary that the object moves.
• D: Work occurs when energy acts on an object. NO. Forces act on objects.

The best explanation of work is that work occurs when a force acts on an object and causes the displacement of that object.

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