| A | B |
|---|
| speed | distance is lenghth between 2 places/is measured in meters or kilo./speed is the rate 2 which an object is moving/speed=distance divided by time |
| constant speed | speed that doesn't change/distance is plotted on the vertical axes [Y]/time is on the horizontal [x] axes/distance -time graph for constant speed is always a straight line |
| average speed | th speed of a moving object is not always constant/distance divided by time will give u the average speed |
| velocity | used to describe both the speed &direction of motion/is speed in a given object |
| constant velocity | velocities that have same direction are added together.use subtraction when combining velocities in opposite directions |
| ex. for................ | rowng downstream:16km/hr(boat)+10 km/hr (stream)=26km/hr;upsream:16km/hr(boat)-10km/hr(stream)=6km/hr |
| changes in velocity | the rate of change in velocityis know as acceleration/acceleration=final vel.-original vel.divided by time |
| acceleration | tells you how fast someting is happening.like vel.accel.has direction/is measured in kilometersper hour per houror (m/s/s)s=sec |
| deceleration | negative velocity |
| acceleration curve | a distance-time graph for acceleration is always a curve rather than a straight line |
| circular motion | an object in circular motion is accelerating even though its speed may be constant |
| momentum | all moving objects have mom./depends on the mass of the object and the velocity w/which it is traveling/momentum=mass x velocity |
