How does increasing momentum affect kinetic energy?

AI Thread Summary
Increasing the momentum of a body affects its kinetic energy based on the method of momentum increase. The relationship between momentum and kinetic energy depends on whether velocity or mass is altered. The formulas for momentum and kinetic energy share similar variables, highlighting the importance of specifying which variable is changed. Generally, changes in velocity have a more significant impact on kinetic energy than changes in mass. Understanding these dynamics is crucial for accurately determining how kinetic energy varies with momentum changes.
Puneeth423
Messages
51
Reaction score
0
If the momentum of a body is increased n times, its kinetic energy increases by how many times?
 
Physics news on Phys.org
Depends on what you did to increase the momentum.
 
the_emi_guy said:
Depends on what you did to increase the momentum.

Thank you.
 
He does have a point, even though his answer seems a little curt.

What's the formula for momentum?

What's the formula for kinetic energy?

They use the same variables, but which one you change matters. Usually, you're looking at what happens when the velocity changes, but you need to specify which to really answer the question.
 
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Thread 'Beam on an inclined plane'
Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
Back
Top