Download presentation
Presentation is loading. Please wait.
Published byLeslie Godfrey May Modified over 9 years ago
1
Multi-step problems Elastic Collisions Center of mass motion Rocket propulsion Lecture 16: Linear momentum and energy. Center of mass motion.
2
Momentum and energy in multi-step problems
3
Example: Ballistic pendulum
4
Energy in collisions
5
Elastic collisions
6
Example: elastic head-on collision with stationary target
7
After some algebra:
8
Rosencrantz and Guildenstern are dead
9
General elastic collisions: two-dimensional, off-center, particles move away at angles
10
Center of Mass: Definition Continuous object: integration If object has line of symmetry: CM lies on it. Same amount of mass on both sides.
11
Center of Mass: Example
12
Center of mass and momentum
13
Center of mass and external forces Particles in system interact Internal forces occur in action-reaction pairs, cancel. Only external forces remain. Demo: Center-of-mass motion
14
Discussion question
15
Another discussion question You find yourself in the middle of a frictionless frozen lake. How do you get to the shore? Throw something Same principle as rocket motion Demo: rocket cart
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.