# Moving along a horizontal surface (no friction)

• inv4lid
In summary, the problem involves a body moving on a horizontal surface with two sets of data points: a force of 40N and an acceleration of 2m/s^2, and a force of 50N and an acceleration of 3m/s^2. The question is to find the mass of the body. Using the equation ΣF=ma, the friction force can also be calculated.
inv4lid
At a force of 40N, the body moves along a horizontal surface with an acceleration of 2m/s^2 and under the action of 50N with an acceleration of 3m/s^2. What is the mass of the body?

F1 = 40N
a1 = 2m/s^2
F2 = 50N
a2 = 3m/s^2
_____________
m=?
2. Homework Equations

As there's no vertical acceleration, we probably don't have to deal with gravity nor N. The only thing i managed to get is N = -G which is somehow useless.

## The Attempt at a Solution

No idea how to get the mass, can anyone help me?

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You are certain you have included all information from the problem statement?

inv4lid
Yes

inv4lid
If you're going to ask for help, you need to include the problem exactly as it was stated. Where did you get that it's a frictionless surface as you put in the title?

inv4lid
Bystander said:
I have included all information, absolutely

RedDelicious said:
If you're going to ask for help, you need to include the problem exactly as it was stated. Where did you get that it's a frictionless surface as you put in the title?
We haven't learned friction at movement yet
The chapter the problem belongs to is "second law of Newton"

The relevant equation is ΣF=ma. You surely have met that one. Perhaps you know it as Fnet=ma, which is the same thing.
If there is no friction then Fnet is easy, but now the question is giving you inconsistent data. The only thing that makes sense is that there is friction.
Take the frictional force to be the same in both cases.

inv4lid and CWatters
+1

Mass and friction are unknown. If you have two unknowns you will need two equations. Fortunately the problem statement gives you two sets of data points. So not only can you calculate the mass but you can also calculate the friction force that exist.

inv4lid

## 1. What is the definition of "no friction"?

"No friction" refers to a scenario in which there is no resistance or opposing force present when an object moves along a horizontal surface. This means that the object will continue to move at a constant speed without any external forces acting upon it.

## 2. How does the absence of friction affect the movement of an object on a horizontal surface?

The absence of friction allows an object to move without any resistance or slowing down. This means that the object will continue to move at a constant velocity until an external force is applied.

## 3. Can an object move along a horizontal surface without any friction present?

Yes, it is possible for an object to move along a horizontal surface without any friction present. This is known as an ideal or theoretical scenario, as there is always some level of friction present in real-world situations.

## 4. How does the presence of friction impact the energy of an object moving along a horizontal surface?

The presence of friction causes some of the energy of the moving object to be converted into heat energy. This results in a decrease in the overall energy of the object, which can cause it to slow down or eventually come to a stop.

## 5. What are some factors that can affect the level of friction present when an object moves along a horizontal surface?

The level of friction present can be affected by factors such as the texture and surface material of the object and the surface it is moving on, the weight and shape of the object, and the presence of any external forces such as air resistance or gravity.

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