Direction
Force
Energy
Motion
When you say, "Follow this particular road for a half mile," what kind of information are you providing in addition to distance?
Needs a direction
May we go wrong direction
The person may defy gravity
The person may weigh more
The person may walk a half mile in the wrong direction
The person may be slower
Why is more info needed to describe a vector?
Direction and distance
Size
Motion and distance
Direction and force
Force and distance
Distance
Direction
What two pieces of information does a vector provide?
Pushing the swing away from herself
Swing away from herself
Pushing the swing left
Away from herself
Swing away from itself
Pushing the swing toward herself
What is the direction of force in which the girl is pushing a swing in Figure 1.1?
Pulling force
Direction of the object
Pushing force
Distance
Size of the object
Direction
If you know a force magnitude already, then what else do you need in order to give you the knowledge of a vector?
Connection of the force
Distance of force
Change it's velocity
They both have the same direction
The direction of the force is independent of the amount of force
Motion of the force
It explains the size of the force
What does a strong push or a weak push have to do with force?
2 miles
1 mile
Half an hour distance
Half a mile
3 miles
How far is the green house on Sumter St.?
Can be used to denote distance and direction
Force is a vector
A conductor
Force
Gravitational entity
A combination of direction and distance
An insulator
Direction
What is a vector?
Force is a vector. What then is a vector? Think about how you would give directions to a friend. You would not say, just walk half a mile. The person may walk a half mile in the wrong direction! More information is needed. You may say, follow this particular road for a half mile. You may say, look for the green house on Sumter St. In both examples, you provided a direction. You also gave the distance. In other words, you provided a vector. You did not just give a distance. Both pieces of information are needed to find a location. This is just like describing forces. To explain forces, both size and direction are needed. Notice the girl in Figure 1.1. She is pushing the swing away from herself. Thats the direction of the force. She can give the swing a strong push or a weak push. 