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Answer :
Option (B) is the correct answer.
The net force on the bookshelf is 32.1 N.
What do we know about frictional force?
The force produced by two surfaces coming into contact and sliding against one another is referred to as frictional force. The following variables impact the frictional force: The surface texture and the amount of force pressing them together have the most effects on these forces.
What are the types of friction?
- Two solid surfaces in touch are opposed to one another's relative lateral motion by dry friction.
- Layers of a viscous fluid might encounter friction when they move in relation to one another, which is referred to as fluid friction.
- A lubricating fluid separates two solid surfaces in lubricated friction, a kind of fluid friction.
- A part of drag, the force preventing a fluid from moving smoothly across a body's surface, is skin friction.
- Internal friction is the force preventing motion among the constituent parts of a solid substance as it deforms.
Given :
Frictional force = 2.9 N
Horizontal force applied on the bookshelf = 35 N
Solution :
Net force = Horizontal force - frictional force
Net force = (35 - 2.9) N = 32.1 N
Therefore, net force acting on the bookshelf is 32.1 N .
To learn more about friction:
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