Kinematics
How many kinematic equations are there on the reference table?
3
What are the units for mass?
Kilograms (kg)
What are the units for energy?
Joules (J)
Is mass a scalar or vector quantity?
Scalar
How do initial momentum (pi) and final momentum (pf) compare to each other?
They're equal
What kinematic equation would you use in order to determine initial velocity if you already knew the final velocity, acceleration, and time?
vf=vi+at
What are the units for force?
Newtons (N)
What is the equation for potential energy (PE)?
PE=mgh
Is velocity a scalar or vector quantity?
Vector
What is impulse?
Change in momentum
What kinematic equation would you use in order to determine the initial velocity if you already knew the final velocity, acceleration, and distance?
vf2=vi2+2ad
What are the units for acceleration?
Meters per second squared (m/s2)
What is the equation for kinetic energy (KE)?
KE=(1/2)mv2
True or false...scalar uses both direction and magnitude?
FALSE
What is the equation for impulse?
△p=Ft
What kinematic equation would you use in order to determine the initial velocity if you already knew the time, acceleration, and distance?
d=vit+(1/2)at2
What are the units for work?
Joules (J)
True or false...KE=PE?
TRUE
True or false...displacement is a vector?
TRUE
What are the units for impulse?
kg*m/s or N*s
a=2m/s2 d=3m vf=4m/s vi=???
vi=2m/s
What are the units for momentum?
Kilograms times meters per second (kg*m/s)
What are the equations for work (hint: there's more than one)?
W=Fd & W=△ ET
What character from what movie defines what a vector is while dancing?
If a 10kg cart with a velocity of 5m/s collides with a 25kg cart at rest, how much velocity will the system have after the collision? (Assume that the two carts stick together after they collide.)
2m/s