Kinematics Diagrams Our topics today Describing Motion with

Kinematics Diagrams

Our topics today: • Describing Motion with Diagrams – Stroboscopic Images – Vector Diagrams – x-t, v-t, a-t graphs • Motion in constant acceleration – 1 D Kinematic Equations • That’s it, folks!

Stroboscopic Images time 1 sec 2 sec 3 sec position 1 cm 5 cm 11 cm

Stroboscopic Images

Stroboscopic Images

Stroboscopic Images

Stroboscopic Images

Stroboscopic images • Try daw ang interactive physics. ; )

Vector Diagrams Using Displacement Vectors

Displacement-time (x-t) graphs

Displacement-time (x-t) graphs

Displacement-time (x-t) graphs

Displacement-time (x-t) graphs

Displacement-time (x-t) graphs Which is which? A 1. Positive and changing velocity (acceleration) 2. Positive and constant velocity B Get 1/4

Displacement-time (x-t) graphs Which is which? A B C D 3. Slow, leftward (-), Constant Velocity 4. Fast, leftward (-), Constant velocity 5. Slow, rightward (+), constant velocity 6. Fast, rightward (+), constant velocity

Displacement-time (x-t) graphs Which is which? A 7. Negative velocity (-), slow to fast 8. Leftward velocity (-), fast to slow B

Velocity-time (v-t) graphs Constant Velocity Changing Velocity, Constant Acceleration

Velocity-time (v-t) graphs

Velocity-time (v-t) graphs

Velocity-time (v-t) graphs The area bounded by the “curve” and the x-axis determines the displacement, or how far the ball travels.

Motion in Constant Acceleration • That’s something for the black board. • Reminder: Quiz Next Meeting – Vectors – Vector properties – Resolving vectors into x- and y- components – Numerical addition of vectors – Et cetera