Which action would require no work to be done on an object? A: lifting the objec

Question

Which action would require no work to be done on an object?
A: lifting the object from the floor to the ceiling

B: pushing the object along a horizontal floor against a frictional force

C: decreasing the speed of the object until it comes to rest

D: holding the object stationary above the ground


I also want to know how can I tell if there is work done or if there isn't. For example, another question asks,
When is the most work done on an object?
Force perpendicular to velocity
Force diagonal to velocity
Force against velocity
Force with velocity
Thank you for yoru help!

Explanation / Answer

The answer is D, because Work= Force x Distance Since the object is not being moved at all, there is no work done For the other question, the most work is done when the force is with velocity im pretty sure. Now the equation for work is W=Fdcos(x). That means that at 0 degrees, the cos 0 is at its max, 1. anything else is less than that. So actually anything directly with or against velocity would be the most work.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.