Suraj tried to push a wall but failed to move it, then
Answers
Answer:
As we know work done us Force X Displacement
If a person tries to push the wall he applies the force but displacement is zero, so product of force and displacement will be zero. So work done is zero.
so option D is correct.
Answer:
yes
Explanation:
If you push against a wall, there's no displacement. So can we say there's no work done?
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Yes, we can. According to the definition of work; Work is said to be done when a force displaces a body. Thus, work is not done in such a case. However, energy is spent(still not work)
So yes, yes we can say that no work is done.
Work
Work results when a force acts upon an object to cause a displacement (or a motion) or, in some instances, to hinder a motion. Three variables are of importance in this definition - force, displacement, and the extent to which the force causes or hinders the displacement. Each of these three variables find their way into the equation for work. That equation is:
Work = Force • Displacement • Cosine(theta)
W = F • d • cos(theta)
Since the standard metric unit of force is the Newton and the standard unit of displacement is the meter, then the standard metric unit of work is a Newton•meter, defined as a Joule and abbreviated with a J.
The most complicated part of the work equation and work calculations is the meaning of the angle theta in the above equation. The angle is not just any stated angle in the problem; it is the angle between the F and the d vectors. In solving work problems, one must always be aware of this definition - theta is the angle between the force and the displacement which it causes. If the force is in the same direction as the displacement, then the angle is 0 degrees. If the force is in the opposite direction as the displacement, then the angle is 180 degrees. If the force is up and the displacement is to the right, then the angle is 90 degrees.