Chapter+2,+Sesction+1

Investigation: 1. A. starting height: 13 cm B. Maximum height: 10 cm

2. Because last time we received a maximum height less than the starting height, by decreasing the uphill angle, we predict that we will reach about 13 because of less resistance by gravity.

3. The ball reached 9.5 cm with a starting height of 13.

A. Our estimate was was 2.5 cm off of our estimate.T

B. The ball traveled the same distance, but because of the lower angle, it didn't increase in height as much as it did when the angle was greater.

4.

A. We predict that it will go up the ramp further, but gradually increase it's recovered height, however not reach the same height as the first trial.

B. The actual result for maximum height was 9.6 cm.

5.

A. No matter what the angle is, the ball will never reach the same height as the starting height. Other forces act on the ball such as friction that will take away energy from the ball, preventing it from reaching the starting height.

B. I think that it would travel farther up the ramp, but still not reach the same height.

C. The ball's forward momentum.

Notes:

Person on Train Car, Frame of Reference/Point of View If car going 5m/s Person on car see it going 10 mps, person on foot sees it going 15m/s Vb= Vb+Vc= 15m/s

Vbb= How to throw Vc= +10m/s Throw backwards 10m/s moving forward- 10m/s balling backwards= 0m/s perspective from catcher

Things that look like they are staying still

Tower of terror, drop penny, looks like it stays with you the entire time

Active Physics Plus:

Speed of Rock relative to boat=0

In respect to the shore, the rock is moving at 8m/s

The veleocity of the rock in respect to the shore is 14m/s. 6m/s+8m/s=14m/s east

Physics To Go

1. A. The ball will roll for ever. B. This is because an object in motion will stay in motion unless another force acts upon it. In this case it would be friction that would be that force. Because there is no friction on this surface, the ball will just keep moving till eternity.

2. The ball would reach around 20 cm high, at which point gravity would act upon it and bring the ball back down.

3. I do not think it is possible for an object to move with such conditions. If a ball is at rest in space, sure there is no resistance, and inertia would keep it moving infinitely, a force needs to act upon it in order for it to start motion, which would be assisting it in moving.

5. The ball is moving at a velocity of 7m/s in relation to the tree because the speed of the wagon pulled by the bicycle is 4.5 m/s, while the ball is moving at 2.5 m/s, which add up to 7 m/s.

10. One instance would be the recent game of baseball played in space, the ball would move forward, and the pitcher backwards. Another would be golf, and the last football, bowling, shuffleboard, basketball, Curling, soccer because when you are running and you kick it, it looks like it isn't going too fast, but a bystander sees it moving as fast as you, as well as how hard you kick it. Javelin throwing, hockey, B.