Unit Seven: Momentum and Impulse

Yesterday we went over momentum, momentum can be calculated with these equations:

p = m(￫v)

1. p = momentum = units: kg∗m/s
2. m = mass = units: kg
3. ￫v = velocity = units: m/s

Impulse is the average force upon the object multiplied by the time the force is acting on the subject. It is also the change in momentum of the object divided by the change in time.

Impulse = ∆p = (¯F)∗∆t = mv - mvo

1. (¯F) = average force = units: Newtons, N or kg∗m/s^2
2. ∆p = change in momentum = units: kg∗m/s
3. ∆t = change in time = units: seconds, s
4. m = mass
5. vo = initial velocity
6. v = final velocity

 Force is the change in momentum divided by the change in time: (¯F) = ∆p÷∆t.

Here is the boxing game on the Wii fit. Yes, I know, this is lame. Anyway when the boxer dude hits that weird robot thing, his punch exerts momentum on the robot.