Section+1+chap+4

=__//**Section 1- Velocity and Acceleration: The Big Thrill**//__=

toc

What Do you see?
4/13/11 page 348

Construction hat spinning in a chair he thinks hes on a roller coaster

What Do You Think?
4/13/11 page 348

When you just start to drop

Investigate 4/13/11 page 349

Part B


1a. could fall of the chair. could hit something or someone surrounding it. You must be smart and careful with this lab. use commonsense. 4a. change in speed and direction 5a. .4 m/s 6a. change in direction only

7a. b. yes when accelerating.

Physics Talk
page 353 4/26/11

scalar- a quantity that has magnitude (size/amount), but no direction. displacement- the difference in position between a final position and an initial position; it depends only on the endpoints, not the path; displacement is a vector quantity, it has magnitude (size) and direction. vector- a quantity that has both magnitude (size/amount) and direction. speed- distance traveled divided by the time elapsed; speed is a scalar quantity, it has no direction. velocity- displacement divided by the time elapsed; velocity is a vector quantity, it has magnitude (size) and direction. average velocity= displacement/ time elapsed. acceleration- the change in velocity divided by the time elapsed; acceleration is a vector quanity, it has magnitude (size) and direction.

Checking Up
page 354 4/26/11

1. displacement is a measured distance with a direction included. 2. 2 km to school and home 3. Velocity has direction 4. acceleration= change in velocity/ time elapsed

Physics To Go
page 358 4/26/11

1. in notebook 2. the swing into the horizontal curve because it is the biggest change of acceleration 3a. Norway 3b. 1666.6 3c. the thrill comes from accelerating 4. 4m/s^2 5a. speed 4b. displacement 5c. acceleration 5d. velocity 5e. displacement 6. 5 cm/s 7. 10 s