Studied by 6 peopleP= Mass x Velocity
What is the equation for momentum?
FΔT= P final - P Intial
What is the impulse equation?
Impulse
The product of the average force on an object and the time interval over which it acts
Newton-Seconds
What are the units for impulse?
Impulse-Momentum Theorem
An impulse of an object is equal to the objects final momentum minus the object's initial momentum.
Vector
Is impulse a vector or scalar?
Vector
Is momentum a vector or a scalar?
Closed System
A system which does not gain or lose mass
Isolated System
When the net external force exerted on a closed system is zero
Law of Consevation of Momentum
The momentum of any closed, isolated system does not change
To get these answers just multiply Mass x Velocity.
540 N/S Eastward
20,000 N/S Northward
80 N/S Southward
Example Momentum Math Problems:
Determine Momentum:
60- kg halfback moving eastward at 9 m/s?
1000-kg car moving northward at 20 m/s?
40-kg girl running soutward at 2 ms
I = Ft (80)(0.10) = 8N/s
A hockey player applies an average force of 80.0 N to a 0,25 kg hockey puck for a time of 0.10 seconds. Determine the impulse experienced by the hockey puck?
Unequal
Unequal masses will have _____________ accelerations.
Newton's Second Law
According to which one of Newtons Laws does unequal masses will have unequal accelerations.
Force Equal Least
In a collision, there is a ______ on both objects that causes an acceleration of both objects. The forces are _____ in magnitude and opposite in direction, yet the ________ massive object receives the greatest acceleration.
Conserved
In a system total momentum is ______________________--.
Lost Gained
The momentum ____________ by one object is equal to the momentum ____________ by the second object.
Mass Acceleration
Newton's second law says that the net force on an object is equal to its __________ times its _____________.
Momentum
An object's tendancy to remain in motion, but technically, it's an object's mass times its velocity.
Elastic Collision
In this type of collision, kenetic energy is conserved
Inelastic Collision
Kinetic energy is not conserved
Objects stick together
A perfeclty inelastic collision is what happens when ______________________________________.
Perfectly Inelastic Collision
These collisions lose as much kinetic energy as possible to other forms of energy, like heat, or sound, or even potential energy, but still, their momentum is conserved.
Center of Mass
The average position of all the mass in the system
0 It's zero because the woman is standing still so the velocity is zero.
If there is a 70 kg woman standing still what is the momentum?
Note
Flashcard