Science requires careful observations

Why does this boat float?

# Ship floating on nothing! :: Physikshow Uni Bonn

School blocks YouTube? Use the file below

Sulfur hexafluoride is more dense
then the surrounding air

When physicists study motion they study
displacement not distance.

Video Instruction

showmethephysics.com

C. Displacement - distance & direction from start to finish

1) Examples

 Displacement?

1 m up

 Displacement?

3 m Right

(Start to finish)

 Distance = 7 meters   Displacement = 5 m N of E

2) Displacement always has ...

Magnitude

(a number)

..and direction

a) Examples

• 5m East
• 7m upward
• + 17 m

b) Positive and Negative Signs also show direction

+ Usually up, right, north, east, forward

- Usually down, left, south, west, backwards

c) Symbol for displacement: d

Summary Review

 At what point is the displacement: 1) greatest? 2) zero? 3) equal to distance?

[ Flash ]

4) What is the displacement at C?

 1) B   2) At the start 3) Any point between start and A

 Displacement at C is 4 meters down

 Velocity AP