motion measuring motion. observing motion motion~when an object changes position over time when...
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Motion
Measuring Motion
Observing Motion• Motion~when an object changes position
over time when compared to a reference point
• Reference point~an object that appears to stay in place in relation to an object being observed for motion
Speed Depends on Distance and Time
• Speed~ the rate at which an object moves
• SI unit for speed~ meters per second (m/s)
• Average speed= total distance divided by total time
• Graph~ distance vs. time=speed– Straight line indicates constant speed
Velocity• Velocity~ the speed of an object in a
particular direction
• Velocity changes as speed or direction changes
• Combining velocities (Resultant velocity)– In same direction, add together
– In different direction, subtract
Resultant Velocity
Acceleration• The rate at which velocity changes
• Not just how much velocity changes, but how fast it changes
• Examples: text page 113
• Circular motion~ an object traveling in a circular motion is always changing direction
• Centripetal acceleration~ acceleration that occurs in a circular motion
Acceleration=Final velocity – starting velocity
Time it takes to change velocity
Acceleration Graph• Your Subtopics Go Here
Centripetal Acceleration• Object traveling in a circular motion is
always changing direction– Velocity always changing
– Acceleration occurs