PHYSICS TEST 1 Flashcards
what is speed and its formula
speed is how fast something moves. you do not need to know the direction it is a scalar quantity
distance (d)
v=—————-
time (t)
what is velocity
the rate at which an object changes its position. you must keep track of direction, it is a vector quantity.
e.g 55km/h is speed
55km/h east is velocity
what is the formual to find the time
distance (d)
t=————-
speed(v)
what is the formula to find distance
t X v = distance
draw the formula traingle
Vave // t
what is distance
How far you have travelled from a starting position. NO DIRECTION
what is displacement
How far you have travelled in a straight line from your starting position. MUST HAVE DIRECTION
what is the formula for velocity
displacement (s)
Vave= ————————-
time
displacement triangle
Vave // t
distance on a graph
distance= final position - starting position
e.g 40 - 10
distance= 30meters
On a graph what tells us the speed
The slope or gradient
THE HIGHER THE SLOPE THE FASTER THE SPEED
formula for acceleration
a= change in velocity ( delta v) over time
what is accelartation
the rate of change of velocity(speed)
what is the rate at which everything accelarates gravity
9.8m/s/s
or
35.3km/s/s
what is delta v
v-u
initial velocity - final velocity
