Chapter 6 - Momentum Flashcards
What is Momentum?
Momentum is inertia in motion. Like speed, it is relative to the Earth’s surface unless otherwise stated.
What is the equation for Momentum?
Momentum (p) = mass (m) x velocity (v).
What is Impulse?
Impulse is the quantity force x time interval when there is a change in momentum. It is the overall effect of a force over time. An object can not HAVE impulse.
What is the Impulse-Momentum Relationship?
This relationship states that the impulse is equal to the change in momentum.
What is the relationship between the length a force is applied and impulse?
Longer applied force = greater impulse.
Shorter applied force = lesser impulse.
What happens when you hit a soft object vs. a hard object?
When you hit a small object, you extend the time it takes for your momentum to be brought to 0. This means you lessen the impact and create greater impulse.
When you hit a hard object, the time it takes for your momentum to hit 0 is far shorter. This means the impact is greater and the impulse is less.
Are Impulses greater or less when an object bounces?
Greater!
What is the Conservation of Momentum?
The conservation of momentum says that if no net external force/impulse acts on a system, the momentum will not change.
What happens to momentum upon impact?
It is transferred. The net momentum will remain equal before & after a collision.
What is an Elastic Collision?
An elastic collision is when objects rebound WITHOUT lasting deformation or heat generation.
What is an Inelastic Collision?
An inelastic collision is when objects become distorted and/or generate heat.
