Chapter 7 - Impulse and Momentum Flashcards
Average force and time of contact
Impulse of the force
Impulse equation
J=FΔt
What type of quantity is impulse?
Vector quantity
How an object responds to a force depends on the mass and velocity of an object and their effect is included in what concept?
Concept of Linear Momentum
Equation for linear momentum
p=mv
What type of quantity is linear momentum?
Vector quantity
Standard unit for impulse
N(Newton)•s(second)
Standard unit for linear momentum
kg(kilogram)•m(meter)/s(second)
When a net average force acts on an object during a time interval t, the impulse of this force is equal to the change in momentum of the object
Impulse-momentum theorem
Equation for Impulse-momentum theorem
ΣF Δt=mvf-mvo
Forces that the objects within the system exert on each other
Internal forces
Forces exerted on the objects by agents external to the system
External forces
Equation for impulse momentum theorem
(Sum of average external forces) Δt=Pf-Po
Equation for conservation of linear momentum
Pf=Po
The total linear momentum of an isolated system remains constant and is conserved. An isolated system is one for which the vector sum of the average external forces acting on the system is zero.
Principle of Conservation of Linear Momentum
Collision in which the total energy of the system after collision is equal to the total kinetic energy before the collision
Elastic Collision
Collision in which the total energy of the system is not the same before and after the collision
Inelastic Collision
Collision that happens when the two objects stick together
Completely Inelastic Collision
Average location for total mass
Center of Mass
