Week # 2

On a roller coaster the ascent is the time when you feel the heaviest, the Fa (applied force) is greater than Fg ( force of gravity) and are working against each other. On the way down from a very tall height while going at a tremendous speed ( the amount of distance over a period of time) the Fa is greater than gravity ( the force which the earth pulls on objects) and they are both going in the same direction. NLUG (Newton's Law of Universal Gravitation) devises that gravity is 6.67x10^-11 but if an applied force is greater than this in the same directions objects can become weightless.

1. If the pilot were to disengage from the circle he would continue in a path ______ to the circle ?

A. Tangent *

                                              B. Perpendicular

                                              C. continuous circle

2. How can NLUG be used?

                                             A. To find Universal Gravitation

                                             B. To find the speed at which the earth travels

                                             C. All of the above *

3.  How fast does the earth move ?

                                              A. 107471992.32 m/s *

                                              B. 100 m/s

                                              C. 9653 m/s

Blog #1

A punt is about to ocurr in a football game
The ball is on the ground:

The center long snaps the ball

 

The punter kicks the ball and it comes back down

1.This picture examples what?

A. An object moving to the right

B. An object moving upward

 C. An object suspended in the air*

2. This is an example of what?

A. A ball goin straight up.

B. A rock being dropped straight down

C. a car driving down the road.*

3. Which direction is the object moving?

A. To the left

B. To the right

C. The object is not moving*

Week #7

The problems that I'm having the most problems with are the ones were i canot decide which way it needs to be solved for example, "During a baseball game, a batter hits a pop-up to a fielder 68 m away.The acceleration of gravity is 9.8 m/s2 .If the ball remains in the air for 5.1 s, howhigh does it rise?Answer in units of m."  I do not know whether to use the range formula to solve for Vertical Displacement ( the vertical distance traveled) or if I need to find another given that I am not seein such as the max angle (45 degrees) (The measure of a plane between to lines ) I need to come in before school to talk to my teacher. I should have a study group with friends and read the textbook more by myself.
  1)When does a football, if thrown straight up into the air have an acceleration of 0?                            
                                A:) At the top                                  B:) Never  *
                                C:) As it moves upward                   D:) As it moves down
 2) If a vehicle is at rest and has a top speed of 265 mph but is unable to accelerate, what speed can you get it up to?
                                A:) 183 mph                                    B:) 0 *
                                C:)265 mph                                     D:) 5mph
3)    This picture is an example of ?
      a) Mass
      b) Velocity
      c) an Angle *
      d) Displacement