430 likes | 937 Views
One Dimensional Motion. AP Physics C. Terms. Displacement vs. Distance Displacement: Change in position ( vector ) Distance: How far an object has travelled ( scalar ) Symbol: Δ x or Δ x SI Unit: meter, m. Position. Terms. Velocity vs. Speed
E N D
One Dimensional Motion AP Physics C
Terms Displacement vs. Distance Displacement: Change in position (vector) • Distance: How far an object has travelled (scalar) • Symbol:Δx or Δx • SI Unit: meter, m
Terms Velocity vs. Speed • Velocity: Rate of the change in position (vector) • Speed: Rate of distance covered (scalar) • Symbol:v or v • SI Unit: meter per second, m/s
Terms Acceleration vs. Acceleration • Acceleration: The rate at which velocity changes (vector) • Acceleration: The rate at which speed changes (scalar) • Symbol: a or a • SI Unit: meters per second per second or meters per second squared, m/s/s or m/s2
Velocity vs. Time Graph • The slope of a v vs. t graph is the acceleration • The area between the curve and the horizontal axis of a v vs. t graph is the displacement
Instantaneous Acceleration vs Average Acceleration from a v-t graph
Acceleration vs. Time Graph • The slope means NOTHING • The area between the curve and the horizontal axis is the change in velocity a 10 s t -10 m/s/s
Important Acceleration tells us how fast velocity changes Velocity tells us how fast position changes
Falling Bodies, thrown up objects, and the y-direction • All things fall at the same rate (neglecting air resistance) • On earth that rate is 9.80 m/s2 • That rate is an acceleration • The name of that acceleration is Gravity