413,578 views
37 votes
37 votes
The force pulling a truck downhill is 2,000 N. What is the amount of static friction acting on the truck if the truck does not move?

User Martijn Otto
by
3.0k points

1 Answer

19 votes
19 votes

So, amount of static friction acting on the truck if the truck does not move is 2,000 N.

Introduction

Hi ! Here I will help you to solve the problem about static friction. Friction is a force that inhibits or reduces the value of the force acting on an object. If viewed from the direction of the initial force, the frictional force will always have a negative value (-) due to always have opposite direction from the intial direction. Friction is divided into two types, namely :

  • Static friction (
    \sf{f_s})
    , occurs when the resultant force is 0 N or in other words the object is still at rest.
  • Kinetic friction (
    \sf{f_k})
    , occurs when the object has moved, so that the resultant force not 0 N.

Formula Used

The formula used in this case is the equation for static friction. Pay attention at below.


\sf{\sum F = 0}


\sf{F - f_s = 0}


\boxed{\sf{\bold{F = f_s}}}

With the following condition :


  • \sf{\sum F} = resultant of the force (N)
  • F = force that applied to object (N)

  • \sf{f_s} = static friction (N)

Solution

We know that :

  • The truck affected by static friction
  • F = force that applied to object = 2,000 N

What was asked ?


  • \sf{f_s} = static friction = ... N

Step by step :


\sf{\sum F = 0}


\sf{F - f_s = 0}


\sf{F = f_s}


\boxed{\sf{2,000 \: N= f_s}}

Conclusion

So, amount of static friction acting on the truck if the truck does not move is 2,000 N.

User Ssegvic
by
3.1k points