impulse and momentum

What is the definition of momentum?

Inertia in motion

What is the equation for momentum?

mass x velocity

What are the units of momentum?

kgm/s

Is momentum a vector or scalar?

vector, it has direction

How do you get something moving?

Apply a big force for as long as possible

Is change in momentum pre-determined?

Yes

What is the equation for a change in momentum?

(Force)(Time)

_____ TIME = _______ FORCE

LONGER, SMALLER

What is impulse?

Change in momentum or the relationship between force and time

What are units for impulse?

Newtons x Seconds

How does Newton’s third law apply to impulse?

Impulses equal and opposite

Therefore, according to Newton’s third law….

momentum lost by one object is equal to the momentum gained by another object

Every ____ is and interaction

force

Every _____ is an interaction (1)

impulse

What does it mean for momentum to be conserved?

The total amount of momentum does not change, the momentum before = the momentum after

What are two examples where momentum is conserved?

explosion and collision (internal force between two objects)

What is a momentum statement?

An equation that represents momentums present in the interaction and the conservation. It is specific to the objects.

What is the 1st type of a collision?

Elastic (bouncy)

What is the 2nd type of collision?

inelastic: kinda bouncy, bouncy/squishy

What is the 3rd type of collision?

inelastic: sticky

What is the 1st example of a momentum statement?

m_av_a + m_bv_b = m_av_{f +}m_bv_bf

What does the equation “m_av_a + m_bv_b = m_av_{f +}m_bv_bf“ mean?

When two objects run into each other and then bounce apart

What is the 2nd example of a momentum statement?

0 = m_gv_g + m_dv_d

What does the equation “0 = m_gv_g + m_dv_d” mean?

Two objects start at rest and then push apart

What is the 3rd example of a momentum statement?

m₁v₁ = (m₁v₂)V

What does the equation “m₁v₁ = (m₁v₂)V” mean?

A moving object runs into an object at rest and the two stick together?

What is the 4th example of a momentum statement?

m_sv_s + m_ev_e = (m_s + m_e)V_f

What does the equation “m_sv_s + m_ev_e = (m_s + m_e)V_f” mean?

Two moving objects start apart and then run into each other and stick