Momentum Flashcards
Symbol and unit for momentum?
P, kg x m/s
How do you calculate change in momentum?
Pf - Pi
Symbol and unit for time?
t, s
Symbol and unit for Energy?
E, kj
Symbol and unit for Gravitational acceleration?
a
Symbol and unit for force?
F, N
Symbol and unit for work?
W, j
Formula for work?
W = Fs (s is displacment)
Symbol and unit for Power?
P, watts (w)
What is momentum?
Momentum is the oomph of an object in motion. it is p = mv (p is momentum).
What does it mean when momentum is conserved during a collision?
It means that momentum does not get lost unless an external force interrupts it. (i.e friction, but this is usually ignored).
What is the difference between elastic and inelastic collision?
An elastic collision is where kinetic energy is just changed into kinetic energy. An inelastic collision is where kinetic energy is changed into other forms of energy such as sound or heat etc.
what type of collision is impulse?
Elastic.
What is the equation for impulse, and what happens if we increase the change in time?
Change in p = F x Change in t
Increasing contact time (or change in time) will lessen the force sustained during the collision due to F = p/t where F is inversely proportional to t.
