Ask Experts Questions for FREE Help !
Ask
    fry116's Avatar
    fry116 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Dec 11, 2010, 02:41 PM
    What is the net force on the box when a 15 N horizonatal force is applied to the box
    The coefficient of kinetic frictions between a 3.to kg box and a desk is 0.30.
    Annalyse's Avatar
    Annalyse Posts: 26, Reputation: 2
    New Member
    		  
    #2

    Dec 11, 2010, 05:31 PM
    May I ask, why are you asking this question?

    Annalyse
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #3

    Dec 12, 2010, 10:53 AM

    I would guess... homework! :D

    The force of friction acting on a body is given by the formula:



    where F is the force of friction,
    mu is the coefficient of friction,
    R is the normal force acting on the body concerned.

    First find the frictional force with the formula I gave you.

    Then, remember that the net force is given by the vector addiction of all the forces acting on the body, and that the pushing 15 N force acts in opposite direction to the frictional force.

    Post what you get! :)
    fry116's Avatar
    fry116 Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Dec 12, 2010, 02:30 PM
    Comment on Unknown008's post
    Please explain in further detail. I am not following everything you're saying. Thanks:)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #5

    Dec 13, 2010, 02:24 AM

    Could you tell more specifically what you are not understanding?

    is called 'mu' and is a greek symbol, which is used in mechanics to represent the coefficient of friction.

    R, the normal force is what prevents things to dig into the ground. The Earth pulls on everything and the ground pushes in the opposite direction so that the net vertical force is 0 and as there is 0 net force, there is no motion according to Newton's First law.

    This is assuming you didn't understand what mu and R meant.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Applied force vs Normal force [ 1 Answers ]

what is the accepted value of the slope of a graph on the applied force vs normal force? this is grade 11 physics, so give decent answers

Find force of gravity, normal force, and net force in Physics [ 6 Answers ]

A crate of mass m (=10 kg) is placed at rest on a (frictionless) inclined plane, which has an angle (= 30 deg ) above horizontal 1. The force of gravity on the crate is? 2. The normal force on the crate is? 3. The net force on the crate is? 4. How long would it take the crate to slide 8 m...

How to determine net force with one force missing? [ 2 Answers ]

How do I determine the net force of an object when the force on one side of the object is unknown. If the force pushing against this the object on the left side is 50N, and the force pushing againsts the right side which is unknown(f2) Then how do I get fnet?

Force applied to an object [ 3 Answers ]

The more direct a force is to an object will the object move farther

View more questions Search