1. Translational Motion Flashcards
what is a vector
physical quantity that has both direction and magnitude
what is a scalar
physical quantity that has magnitude but no direction
what do you do when adding vectors
- head of 1st vector placed towards tail of the 2nd
- arrow drawn from tail of 1st vector to head of 2nd one
- resulting arrow = vector sum of the 2 vectors
what do you do when subtracting vectors
- place heads of the 2 vectors together and draw an arrow from tail of 1st vector to tail of 2nd vector
- resulting arrow represents vector diff between the 2 vectors
what is distance
how much ground object has covered
what is displacement
objects overall change in position
is distance and displacement vector/scalar
distance = scalar
displacement = vector (has direction)
what is velocity
speed with direction
what is the units for velocity
length/time
is speed and velocity vector/scalar
speed = scalar
velocity = vector
what is the equation for speed
speed = distance/time
what is the equation for velocity
velocity = displacement/time
what is acceleration
rate of change in velocity
is acceleration a vector
yes it has direction and magnitude
what are the units of acceleration
m/s^2
what is the equation for acceleration
acceleration = rate of change of velocity/time
what is uniform accelerated motion
motion that involves constant acceleration
what is the linear motion equation for distance (x)
x = x0 + v0t +1/2at^2
what is the linear motion equation for velocity (v)
v = v0 + at
what is the linear motion equation for velocity squared (v^2)
v^2 = v0^2 + 2ax
what are the 2 terms/conditions that allow the use of the linear motion equations
- must be constant acceleration
- must be linear motion
what is the linear motion equation for average velocity (v avg)
v avg = 1/2(v + v0)
