Galileo's Thought Experiment on Motion
Galileo thought that a ball, rolling or sliding down a hill without friction, would run up to the same height on an opposite hill. Galileo's conclusion from this thought experiment was that no force is needed to keep an object moving with constant velocity.
Example of Instantaneous Speed
Galileo's Experiment On Acceleration Due To Gravity
Example of Average Speed
Galileo wanted to know how long it took a ball to move a given distance. He tested them and got mostly accurate measures. He was able to test mathematical relationships between various factors which led to the first accurate equations about the motions of objects.
Speed=Distance/Time
Newton's Law of Motion
Speed
Velocity
Velocity is the rate of change in position: the rate of change in the position of an object as it moves in a particular direction.
1. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
2. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
3. For every action there is an equal and opposite reaction.
Constant Speed- The rate of speed without the speed changing, (slowing down or speeding up), The speed is constant.
Acceleration
Acceleration due to gravitational attraction of massive bodies in general.
Sites
The numerical value for gravity is known as 9.8m/s/s
Acceleration is the increase in the rate or speed of something. The formula is final velocity minus initial velocity over time. (fV-iV/Time)
(Video example of acceleration on a dirt bike.)
http://www.bing.com/images/search?q=example+of+average+speed&qs=n&form=QBIR&pq=example+of+average+speed&sc=2-22&sp=-1&sk=#a
http://www.bing.com/images/search?q=example+of+average+speed&qs=n&form=QBIR&pq=example+of+average+speed&sc=2-22&sp=-1&sk=#view=detail&id=DF1047EF27C043A4DDD4214D44CC8DD22EE72243&selectedIndex=4
http://www.bing.com/search?q=velocity+definition&qs=SS&sk=SS1&pq=velocity+de&sc=8-11&sp=2&FORM=QBRE&cvid=c7f31660b57e4eb39355328ec9717b6a
http://csep10.phys.utk.edu/astr161/lect/history/newton3laws.html
http://www.nuffieldfoundation.org/practical-physics/galileos-thought-experiment
https://answers.yahoo.com/question/index?qid=20110505175034AACl1yV
Instantaneous Speed- Velocity of an object at a certain time.
Example of Constant
Speed
Average Speed- Total distance divided by the total time traveled.
Motion In A Vacuum
Motion in Space
The motion of the brush takes the dirt in then the motion of the fan pushes the dirt up into the filter which filters the debris and lets the clean air go out through an exhaust while the dirt goes into the dust bag.
In the outer space, when an object is moved, It moves in one direction. It follows the orbit from which it was moved, it requires extra force to escape from its orbit.
Constant Speed= Speed/Time