# Download Speed up Slow down Change direction 2 m/s 2 Ball rolling down a

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•Must go a distance A change of position over time. •Caused by force •Can be relative motion • running • the floor •Skipping •A statue •driving •Sitting still a measure of how fast something moves through a distance over a definite time • unit = m/s •Meters per second •s = d/t •Fast or slow speed • 25 m/s •100 km/hr • 25 m/s2 •6 meters •5 seconds •Must have a direction Speed in a specific direction •vector Velocity •2 m/s left •35 km/hr north • turning in circles •acceleration •Speed up The rate at which velocity changes. •Slow down •Change direction Acceleration •2 m/s2 •Ball rolling down a ramp •Car turning •m/s •Speed stays same •velocity •F=ma A push or pull that changes motion or shape of object. •Unit = newtons •Obj. may or may not move •Affects acceleration •More mass need more force force •Balanced •Gravity •Friction •Action/reaction • mass •Space has no gravity or friction •Same as no force Two equal forces in opposite directions. •Net force = zero Balanced •Two people pushing on a ball that doesn’t move force •Unbalanced force •Object moving •Mass (proportional relationship) The resistance of an object to a change in speed or direction. •Newton’s first law Inertia •Hitting a baseball •Anything with mass •Energy because it has no mass The force objects exert on each other because of their mass. •Will be different on different planets •Pulling force •Makes things accelerate Gravity •More on Jupiter •Less on Pluto •Friction •space •Describes how heavy The measuring of the force of gravity pulling down on an object. •W= mass x gravity Weight •Pounds •kilograms •mass •Slows things down The fluid friction due to air. •Parachute of a skydiver •When running •aerodynamics •Goes opposite the force Air Resistance •Gravity •Water resistance