Is Momentum Conserved with Different Force Directions and Types?

Click For Summary
SUMMARY

The discussion focuses on the conservation of momentum and the implications of external forces in a system. It establishes that if no external forces act in the x direction, the y component of momentum remains constant. Additionally, it confirms that momentum is conserved when work is done solely by conservative forces, while the Work-Kinetic Energy theorem is deemed invalid when influenced by non-conservative forces. The participant's responses to the questions were False, True, and True, respectively, prompting a request for reasoning behind these answers.

PREREQUISITES
  • Understanding of momentum conservation principles
  • Knowledge of conservative and non-conservative forces
  • Familiarity with the Work-Kinetic Energy theorem
  • Basic physics concepts related to force and motion
NEXT STEPS
  • Study the principles of momentum conservation in different force scenarios
  • Explore the differences between conservative and non-conservative forces
  • Investigate the implications of the Work-Kinetic Energy theorem in various contexts
  • Review examples of momentum conservation in real-world applications
USEFUL FOR

Physics students, educators, and anyone interested in understanding the principles of momentum and energy conservation in mechanics.

dherm56
Messages
16
Reaction score
0
5) If there are no external forces acting on a system in the x direction, but there is an external force acting on the system in the y direction, then the y component of momentum of the system is constant.

True
False

6) If work is done on an object by only conservative forces, then the momentum of that object must be conserved.

True
False

7) The Work-Kinetic Energy theorem is invalid if work is done by a non-conservative force.

True
False

I answered False, True, True.
any sugestions?
 
Physics news on Phys.org
How about showing one's reasoning.
 

Similar threads

Spring momentum conservation problem
  • · Replies 4 ·
Replies
4
Views
2K
Is Linear Momentum Conserved in This Case? (sliding box hits a floor tile)
  • · Replies 2 ·
Replies
2
Views
1K
Using conservation of energy and momentum in projectile motion
  • · Replies 18 ·
Replies
18
Views
2K
Conservation of Mechanical Energy - Which Equation To Use?
  • · Replies 9 ·
Replies
9
Views
2K
Is potential energy defined only for internal conservative forces?
  • · Replies 15 ·
Replies
15
Views
2K
Conservation of momentum and mechanical energy on an inclined plane
  • · Replies 19 ·
Replies
19
Views
3K
Angular momentum conservation on a merry-go-round
  • · Replies 5 ·
Replies
5
Views
2K
Conservation of Energy when lifting a box up off the floor
  • · Replies 5 ·
Replies
5
Views
2K
Is energy conserved is this problem?
  • · Replies 44 ·
2
Replies
44
Views
4K
Conservation of momentum - trampoline
  • · Replies 5 ·
Replies
5
Views
3K