Section+1

=__//**Section 1- Newton's First Law: A Running Start**//__= toc

What Do You See?
page 32 11/19/10

You can see a kid who starts running and then hits the soccer ball which goes very far over the goal. The goalie is looking up at the ball. The boy is kicking the ball so it doesn't go as far. The mouse is trying to move the ball. The stars represent nothing happening around the ball. The dog is starting to get tired. Also, there is a music note where the ball got kicked to represent the noise. The balls follows a curved pass because of gravity.

Investigate
11/19/10

1c. 5.75 2. the height will get higher because he will gain more speed. 3a. the skater went higher than before. It is because the slope was increased. b. The second height is 8.3 m and the original was 6.8m. 4a. the height will be less than before because the skater will get less height. 4b. The skaters height was 6.2 and the ball is 5.8m. 5a. No he is going straight and will never recover. b. very long c. the force that push him down and mass. d. he just ends up falling off. 6a. increases as slope decreases. b. gets lower and lower. c. It is the same. d. never

Checking Up
page 138 11/21/10

1. The natural tendency of an object to remain at rest or to remain moving with constant speed in a straight line. 2. When there is no unbalanced force, an object at rest remains at rest, and an object already in motion remains in motion with constant speed in a straight- line path. 3. a force 4. gravity and friction. 5. the larger mass 6. You need to compare the speed of train also. It is different in the train than it is out of it.

Active Physics Plus
page 139 11/22/10

Sin theta = opp/hyp theta = inv Sin(opp/hyp)

Cos theta = adj/hyp theta = inv Cos(adj/hyp)

Tan theta = opp/adj theta = inv Tan(opp/adj)



1a. 14.14 cm 1b. 20 cm 1c. 29.24 cm 2. 3a. 57.59 cm 3b. 572.99 cm 3c. 5729.58 cm 3d. 57295.78 cm 4. A ball will roll forever unless a force or pull is acted upon it.

Physics To Go
page 143 11/22/10

1. It will roll forever because there is no force to stop it like Newton said in his first law. 2. 20 cm 3. nope because there will always be gravity. 4. It is pushed from the stick until it hits another stick to stop it. 5. 7 m/s 6. 14.5 m/s 7. a. 8 m/s b. 3.2 m/s c. 2.4 m/s 8. 103 m/s 9. a. 21.2 cm b. 43.9 cm c. 57.95 cm d. 172.1 cm