Welcome

It is highly recommended that you have Javascript enabled; many features will not work unless you do. The recommended browsers are Firefox and Chrome; the board is also NOT mobile-friendly.

If you were referred by someone (ex. me, Jessica) please put their username in the referral box on the registration page. Ask them if you don't know their username.

If you are visiting for TESTING PURPOSES ONLY, this is the test account information:

Test

Select a forum to post in:

## Momentum and Impulse

Science topics

Moderators: Jessica, Teachers

Looking for a topic?
View the Science Topics Directory to find topics quicker under different kinds of science.

### Momentum and Impulse

What factors affect momentum?

• mass - the greater the mass, the greater the momentum
• velocity - the faster the object is moving, the more momentum it has

Momentum is a physical property of an object by virtue of its mass and velocity (inertia in motion)

p = mv

Units: kg • m/s or N • s

Vector quantity

CHANGE in momentum: Δp = mΔv

Impulse is the product of the force and the time interval over which the force acts
FΔt = mΔv

Impulse-momentum theorem
The impulse exerted on an object is equal to the chance in the object's momentum.

The Law of Conservation of Momentum
Within a closed, isolated system (i.e. no outside forces), the total momentum will remain constant.

p[sub]A[/sub] + p[sub]B[/sub] + p[sub]C[/sub] + ... = p[sub]A[/sub]' + p[sub]B[/sub]' + p[sub]C[/sub]'

Types of Collisions - Momentum is conserved in all collisions
1. Elastic - the objects bounce off of one another
"Perfectly elastic collision" - KE is also conserved

2. Inelastic - the objects stick together and move as one

3. Explosion - the opposite of inelastic collision
• 0

Tales of Ostlea :
Dragon Cave :
Magistream :

Jessica
Board Owner
Topic Author

Sapphire

Posts: 3,470
Topics: 1,244
Articles: 30
Joined: December 22nd, 2010, 8:04 pm