Identifying all the forces

In summary, the problem involves a crate on a truck that does not move relative to the truck due to the strong static friction force acting on it. The free body diagram shows that the forces acting on the crate are the normal force, weight, and static friction. If there were no friction, the crate would move to the left relative to the bed of the truck.
  • #1
Soniteflash
36
1

Homework Statement


A[/B] crate sits in the back of a truck that is accelerating to the right. The crate does not move relative to the bed of the truck. Draw the free body diagram and sum the forces for the crate only.

Homework Equations


F⃗ net=ΣF⃗ =ma⃗ fs≤μsN
[/B]

The Attempt at a Solution



S[/B]o the problem says that the crate does not move relative to the truck. With that in mind, the reason why the crate is not moving is because the static friction is to great for it to be overcome by a force. I am kinda confused about which forces are acting on the crate. I know that there is the normal force, weight and static friction.
Attempt: ΣF⃗x =Fa-Fs=ma=0

ΣF⃗y=Fn-Fmg=MA=0
ru2obc.jpg

So if there was no friction involved, would that mean that the crate would move to the left relative to the bed of the truck?
 
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  • #2
Soniteflash said:


So if there was no friction involved, would that mean that the crate would move to the left relative to the bed of the truck?

Right. (or in this case, it might be less confusing to restate that as "correct";))
 

1. What are the main types of forces?

The main types of forces are gravitational, electromagnetic, strong nuclear, and weak nuclear forces.

2. How do we identify forces in a given situation?

To identify forces in a given situation, we can use Newton's laws of motion and observe any interactions between objects or changes in motion.

3. Can forces be both attractive and repulsive?

Yes, forces can be both attractive and repulsive. For example, gravitational forces are attractive, while electromagnetic forces can be both attractive and repulsive depending on the charge of the objects involved.

4. How do we measure the strength of a force?

The strength of a force can be measured using a force meter or scale, which typically measures in units of Newtons (N).

5. How do forces affect an object's motion?

Forces can cause an object to accelerate, decelerate, or change direction. The size and direction of the force determine the effect on an object's motion.

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