Average Net Force: Kinetic Energy & Momentum

In summary, there are two types of average that can be calculated when given a beginning and ending velocity, distance traveled, and using energy methods. One type is the average force over distance, which can be found by dividing the change in kinetic energy by the distance traveled. The other type is the average force over time, which is determined by dividing the change in momentum by the total time. It is important to note that the term "average" can be misleading in this context, as the two numbers are not simply added together.
  • #1
Maiia
79
0
This is just a general question- Given a beginning and ending velocity, and distance that the object travels, would the average net force be the change in kinetic energy divided by the distance? (Using energy methods only)
I think I've also seen avg force calculated with momentum...
 
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  • #2
There are (at least) two sorts of average you can take:

If you want to calculate a force averaged over *distance*, you can use the change in kinetic energy, divided by distance: Work =\delta E=F_average * d

If you want to calculate an average over *time*, then that would be given by the change in momentum, divided by the total time: impulse=\delta P= F_average * T
 
  • #3
so Kef-Kei/d right?
 
  • #4
Yeah.
 
  • #5
ah i see- "average" is really misleading b/c u don't add the two numbers..
thanks!
 

FAQ: Average Net Force: Kinetic Energy & Momentum

What is average net force?

Average net force is the measure of the overall force acting on an object, taking into account all of the individual forces acting on the object.

How is average net force calculated?

To calculate average net force, you must first determine all of the individual forces acting on an object. Then, you can add these forces together and divide by the number of forces to find the average net force.

What is the relationship between average net force and kinetic energy?

The average net force acting on an object is directly proportional to the object's kinetic energy. This means that as the average net force increases, the kinetic energy of the object also increases.

How does average net force affect an object's momentum?

Average net force plays a crucial role in determining an object's momentum. The greater the average net force acting on an object, the greater the change in momentum of the object.

How can average net force be used to change the motion of an object?

Average net force can be used to change the motion of an object by accelerating or decelerating it. By applying a net force in a certain direction, the object's velocity and therefore its motion can be altered.

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