unit 5 variables

P

Linear momentum [kg*m/s]

Delta P

Linear impulse: change in linear momentum [kg*m/s]

J

Linear impulse: an external force applied for a time interval [N*s]

Delta T

time interval an external force is applied to change a system’s momentum [s]

X_cm

position of the center of mass: the weighted-average location of the parts of the system [m]

v_cm

velocity of the center of mass: the weighted-average of the entire system’s motion [m/s]

Net Force p

Total momentum of a system; only changed by external force [kg*m/s]

Net Momentum; the net momentum of a system is the sum of each objects momentum

Ep=m₁v₁+m₂v₂+…

Net Momentum: the net momentum of a system is directly related to the velocity of the center of mass

Ep=m_tot * v_cm

Impulse(cause): an external force applied for a time interval

J=F delta t= Area of Fvt

Impulse(effect): the impulse on a system is equal to the change in a system’s momentum

J=delta p

J=mv_f-mv_o