physics Flashcards
1
Q
what is a vector?
A
measurement that has mag. AND DIRECTION!
eg. velocity
2
Q
what axis does time go on?
A
x-axis
3
Q
what is the slope of a position v. time graph?
A
velocity
4
Q
what is the slope of a velocity v. time graph?
A
acceleration
(for each segment, —> flat = 0 acceleration)
5
Q
what is acceleration for free fall?
A
10 m/s^2
6
Q
constant acceleration means …
A
constantly slowing down OR constantly speeding up
7
Q
You drop a rock into the well and record the time it takes for it to strike the end of the well. If the rock takes 4. sec to hit the bottom, how deep is the well?
A
80 meters deep
(free fall acceleration is 10m/s2, so in
1s … 10 m
2s … 20m
3s … 40m
4s … 80m
8
Q
What is inertia?
A
resistance to change of velocity
(more mass, more inertia!)
