physics (motion.)

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velocity and acceleration.
- velocity= speed in a direction
- physics-motion.
- A= v-u/t
- average velocity= v+u/ 2.
- v-final velocity u-inital velocity.
- negative acceleration is called deceleration.
velocity time graphs.
- gradient is negative which means deceleration.
- physics-motion.
- acceleration= gradient.
- horizontal line= constant speed.
- area under= distance travelled.
- steeper the gradient= greater the acceleration.
distance time graphs.
- straight slope means constant speed.
- speed= distance/ time.
- horizontal line= stationary.
equations.
- acceleration= change in velocity/ time.
- distance= speed/time.
- rate of change of speed= change of speed/time.
- velocity=displacement/time.
- average speed= final= inital/time.