intro to physics Flashcards
1
Q
what is physics
A
the science of matter motion and energy
2
Q
how do we know an object is in motion
A
if it is moving away from a reference point
3
Q
distance vs displacement
A
distance is the measure of of the path taken but displacement is the change in position from start to finish
4
Q
what is speed + equation and units
A
speed= distance/ time (m/s)
5
Q
what are distance- time graphs used to find and what do different lines mean
A
speed,
-steeper slope= faster
-horizontal line= the object is not moving
-negative slope= object moving backwards
-curved line= not moving at a constant speed
6
Q
what does velocity describe
A
speed and direction
7
Q
velocity equation
A
same as speed but including direction
