The relationship between K.E and Momentum

Thread starter AllenHe
Start date Sep 9, 2011
Tags

Momentum Relationship

AI Thread Summary

Momentum and kinetic energy are closely related concepts in physics, both dependent on an object's mass and velocity. As an object falls, its velocity increases, resulting in a corresponding increase in both kinetic energy (KE) and momentum (P). The formula for kinetic energy, KE = 1/2mv^2, shows that KE increases with the square of velocity, while momentum is calculated as P = mv, indicating a linear relationship with velocity. Therefore, as an object's speed increases, both its kinetic energy and momentum rise simultaneously. Understanding this relationship is crucial for analyzing motion in physics.

Sep 9, 2011

AllenHe

Homework Statement

Is momentum and kinetic energy related?Since when an object is falling,it gains k.e and also gains momentum?

Homework Equations

The Attempt at a Solution

Physics news on Phys.org

Sep 9, 2011

iRaid

Yep, think of it like this (in terms of their formulas):
KE=1/2mv^2 - so basically as the velocity gets greater the KE will become greater till it reaches it's max.
P=MV - as the velocity increases, the momentum increases.

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...

View full post »

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...

View full post »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »