Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 1 (Q.No. 46)
46.
Work done is said to be zero, when
Discussion:
19 comments Page 1 of 2.
Nares said:
1 decade ago
W = Force * Displacement.
Aniket said:
1 decade ago
My query is if I m pushing a table from one place to another and again bringing it back to the same position then the displacement is zero but work done is not zero. So how can it be either (a) or (b). please explain?
Abubakar said:
1 decade ago
Force is zero so using the formula w=f*d work done will be zero.
Dilute said:
1 decade ago
Since we know w=f*s, So if one of this factors (f or s) becomes zero then work done is zero.
Shubboo said:
1 decade ago
From 1st law body remains in state of rest if does not any force applied then how B?
Parth said:
10 years ago
If the magnitude of the force is zero, if the magnitude of displacement is zero, or if the angle between the displacement and force vector is 90 degrees.
Yogesh said:
10 years ago
Any body can give me an example of displacement without force?
Shivaraj said:
10 years ago
I think the correct option should be A only. One need to understand that it is impossible for body to have displacement without applying force.
Bhavsinh said:
10 years ago
Displacement not happen without applying force.
Patrick said:
9 years ago
There can't be displacement without force if Newton's first law is accepted.
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