Work energy method and impulse momentum method

Click For Summary
SUMMARY

The discussion clarifies the distinction between the work-energy method and the impulse-momentum method in physics. It establishes that work, defined as force applied over a distance, results in an increase in kinetic energy, while impulse, defined as force applied over time, results in an increase in momentum. The participants emphasize that work and kinetic energy are not equivalent, nor are impulse and momentum. This differentiation is crucial for understanding the fundamental principles of mechanics.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of work and energy
  • Knowledge of momentum and impulse
  • Basic grasp of physics equations related to force, distance, and time
NEXT STEPS
  • Study the work-energy theorem in classical mechanics
  • Explore the impulse-momentum theorem and its applications
  • Analyze real-world examples of work and impulse in physics problems
  • Review the differences between scalar and vector quantities in physics
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in the foundational concepts of work, energy, impulse, and momentum.

chandran
Messages
137
Reaction score
1
we have two concepts

1)if force is applied for a distance x(i.e work) it increases the kinetic energy of a mass

2)if force is applied for a time t(i.e impulse) it increases the momentum of the mass

why there are two concepts. Are the above two same?
 
Physics news on Phys.org
Neither of those things you just said are correct. Work and kinetic energy are not the same thing and impulse and momentum are not the same thing either.
 

Similar threads

Graduate Does an impulse contribute to both linear and angular momentum?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad I'm calculating more energy out than I put in
  • · Replies 138 ·
5
Replies
138
Views
9K
High School The physics of flywheel launchers (like tennis ball shooters)
  • · Replies 60 ·
3
Replies
60
Views
8K
Undergrad Conservation of angular momentum during collisions
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Impulsive force and simple integration
  • · Replies 12 ·
Replies
12
Views
2K
High School Questions about momentum and force as well as normal force/friction
  • · Replies 35 ·
2
Replies
35
Views
6K
High School Why Do Objects Bounce? Exploring Momentum and Energy Conservation
  • · Replies 6 ·
Replies
6
Views
3K
High School What is the need for the concepts of Work and Energy (KE)?
  • · Replies 8 ·
Replies
8
Views
2K
High School Ignoring the motion of the Earth for energy vs. momentum conservation
  • · Replies 21 ·
Replies
21
Views
2K
High School How to determine applied force when two objects collide? (basic physics engine)
  • · Replies 9 ·
Replies
9
Views
3K