All Flashcards
What are the differences between elastic and inelastic collisions?
Elastic Collisions: Kinetic energy is conserved, objects bounce off. | Inelastic Collisions: Kinetic energy is not conserved, energy lost as heat/sound, objects may stick.
What are the differences between open and closed systems in the context of momentum?
Closed System: No exchange of matter/energy, momentum conserved. | Open System: Exchange of matter/energy, momentum may not be conserved.
In a force-time graph, what does the area under the curve represent?
The area under the curve represents the impulse.
Define momentum.
Momentum is a measure of how much 'oomph' an object has when it's moving; its resistance to changes in motion.
What is the formula for momentum?
, where = momentum, = mass, and = velocity.
Define impulse.
Impulse is the change in an object's momentum caused by a force acting over a period of time.
What is the formula for impulse?
, where = impulse, = change in momentum, = force, and = time interval.
What is a closed system?
A closed system is one where no matter or energy is exchanged with the surroundings; total momentum remains constant.
What is an open system?
An open system is one where matter or energy can be exchanged with the surroundings; total momentum may not be constant.