motion- equations and graphs Flashcards
What do each of these letters stand for?
v, u, a, t, s
v= initial velocity u= final velocity a= acceleration t= time s= displacement
What are the equations of motion?
v=u+at
s=ut+1/2at^2
v^2=u^2+2as
What is the sign convention for down?
negative
What is the sign convention for left?
negative
What is the sign convention for up?
positive
What is the sign convention for right?
positive
What types of motion questions are there?
- object moving in a straight line
2. object moving vertically up or down
What is the acceleration of an object due to gravity?
9.8ms-1
What is the speed of n object at its maximum height?
0ms-1
What is the extra equation of motion?
s=1/2(v=u)t
What do the graphs look like for…
- constant velocity
- uniform acceleration
- uniform deceleration
- a straight line across
- straight line up
- straight line down
What do the displacement graphs look like for…
- constant velocity
- uniform acceleration
- uniform deceleration
- straight line up
- curved line up
- curved line down
What do the velocity graphs look like for…
- constant velocity
- uniform acceleration
- uniform deceleration
- straight line across high up
- straight line up
- straight line down
What do the acceleration graphs look like for…
- constant velocity
- uniform acceleration
- uniform deceleration
- straight line on x-axis
- high up straight line across
- straight line across below x axis (negative)
What a velocity-time graph crossing the x-axis show?
a change in direction