speed Flashcards
1
Q
what is the difference between speed and velocity?
A
speed - change of distance per unit time - scalar
velocity - change of displacement per unit time - speed in a given direction
2
Q
What does constant velocity mean?
A
object moves at the same speed without changing direction
3
Q
What is acceleration?
A
change of velocity per uit time
m s-2
4
Q
What is the velocity equation?
A
(v-u) / t
5
Q
How can acceleration be determined from a velocity time graph?
A
it is the gradient
6
Q
What is the equation for displacement and average velocity?
A
s = ( u + v )t / 2
7
Q
What is the equation for s w/o v?
A
s = ut + 1/2at2
8
Q
what is the equation for V w/o t?
A
v2 = u2 + 2as
9
Q
What does displacement = in a velocity time graph?
A
area under the line
