1. displacement = area between line and axis
2. Type of motion
2.1. max height
2.1.1. v = 0
2.2. free-fall
2.2.1. a = g = 10 m/s2 (downwards)
2.2.1.1. regardless of
2.2.1.1.1. direction of motion
2.2.1.1.2. shape
2.2.1.1.3. mass
2.2.1.1.4. location
2.3. direction of motion determined by
2.3.1. sign of v
2.4. circular motion
2.4.1. direction component of v will keep changing
3. Describe motion
3.1. in term of direction of motion
3.1.1. forward/backward
3.1.1.1. check the sign of v
3.1.2. up/down
3.1.2.1. check the sign of v
3.2. (means slow down in general)
3.3. in terms of v
3.3.1. constant
3.3.1.1. (means a = 0)
3.3.2. increasing magnitude
3.3.2.1. (means speed up in general)
3.3.2.1.1. to check if obj is speeding up (acceleration)
3.3.3. decreasing megnitude
3.3.4. zero
3.3.4.1. (means obj stop)
3.3.4.2. (means obj U-turn)
3.4. in terms of a
3.4.1. constant
3.4.2. increasing
3.4.3. decreasing
3.4.4. zero
3.4.4.1. (means obj in constant v)
3.4.4.2. (means no F-net)
3.5. use 1 x adjective and 1 x noun to describe
3.5.1. e.g. velocity increasing
3.5.2. e.g. acceleration constant
4. Graphs
4.1. V-T graph
4.1.1. if all v are positive
4.1.1.1. means obj keep moving forward
4.1.2. if cut x-axis (v = 0)
4.1.2.1. signal a U-turn
4.1.2.2. signal Max height
4.1.3. gradient
4.1.3.1. indicates the a
4.1.3.1.1. area between line and axis
4.1.4. flat line
4.1.4.1. indicates constant v
4.1.4.2. NOT at rest
4.2. D-T grap
4.2.1. a U-turn on the graph
4.2.1.1. indicates a u-turn
4.2.2. if cut x-axis (d = 0)
4.2.2.1. indicates back to start point
4.2.3. flat line
4.2.3.1. indicates at rest