physics unit 5 variable's quizp

p

linear momentum kg*m/s

delta p

(effect) Linear impulse: change in linear momentum kg*m/s

J

(cause) linear impulse: an external force applied for a time interval N*s

delta time

(momentum) time interval an external force is applied to change a system’s momentum s

Xcm

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

Vcm

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

Sigma p

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

net momentum

is the sum of each object’s momentum in a system

position or velocity of a system’s cm

the weighted-avg position or velocity of the entire system

(2) Net momentum

directly related to the velocity of the center of mass of a system

Impulse (cause)

an external force applied for a time interval

impulse (effect)

the change in a system’s momentum