momentum quest

P\= 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?