Ch+2+Sec+8+KirnumB

=Section 8=

Horizontal speed that transforms into an acceleration upwards
 * What do you see?**


 * What do you think?**
 * You would have to move faster and time it better
 * Their speed, the angle at which they release

a. Techniques: Flip the ruler over and keep most of it hanging off of the table b. Factors: deflection of the ruler (dependent on force and the elasticity); length of the ruler; placement of the penny on the ruler; mass of coin;
 * Investigate**

1 a. How the placement of an object on the ruler will effect the hight that it reaches b. How long the ruler is and the height the penny reaches c. Ruler and a meeter stick d. By making a data table CM || Distance in air CM ||
 * Distance on ruler
 * 2 || 115 ||
 * 2 || 117 ||
 * 2 || 116 ||
 * 4 || 102 ||
 * 4 || 99 ||
 * 4 || 106 ||
 * 6 || 91 ||
 * 6 || 99 ||
 * 6 || 97 ||
 * 8 || 98 ||
 * 8 || 101 ||
 * 8 || 101 ||

Conclusion: The further the penny is on the ruler the less distance it travels with the exception of 8cm


 * Physics Talk**
 * WHen a force acts on an object, the speed and position of it can change
 * Law of conservation of Energy
 * Total energy remains constant but the types of energy can change
 * Kinetic Energy: energy associated with motion
 * KE
 * Equation: KE= (1/2)mv^2
 * Gravitational potential energy: energy associated with position
 * When forces act on objects, energy changes from one form to another
 * When you are above the lowest point
 * GPE
 * Equation: GPE=mgh
 * Potential energy: the total energy
 * Work: the product of displacement and the force in the direction of displacement
 * caused by a force acting over some distance **parallel to the direction of motion**
 * **it isn't energy but it CREATES energy**
 * W
 * Equation: W=Fd
 * Elastic potential energy/Spring potential energy: energy of a spring due to its compression or stretch
 * EPE
 * Equation: EPE=(1/2)kx^2
 * k=spring force constant
 * x= stretched or compressed distance
 * Food energy provides muscular energy and a gain in kinetic energy

> > b.No, this shows that speeds of falling objects are dependent on the mass of the object > > >
 * Checking Up**
 * 1) Another force acting on that object.
 * 2) The ruler pushing up on it.
 * 3) Food gives them more kinetic energy, they get the energy to bend the pole from then the pole straightens and its elastic potential energy is transferred to the pole vaulter. This increases gravitational potential energy as their height increases.
 * 4) Units for:
 * Work: W
 * Equation: W=Fd
 * Kinetic Energy: KE
 * Equation: KE= (1/2)mv^2
 * Gravitational Potential Energy: GPE
 * Equation: GPE=mgh
 * Spring Potential Energy: EPE
 * Equation: EPE=(1/2)kx^2
 * Physics to go**
 * 1) Energy transformations in the shot put:
 * 2) Work
 * 3) Kinetic
 * 4) GPE
 * 5) Kinetic
 * 6) Work Out
 * 7) Energy transformations in golf: work is put on the club by the person then the club applies work to the golf ball changing it from static energy to kinetic energy.
 * 8) [[image:Picture_30.png width="193" height="138"]]
 * 9) The length of the pole doesn't determine the limit of vaulting height because it is dependent on its elastic potential energy. If a pole vaulter used a very thick pole with little elastic potential energy, they wouldn't get very high up. Initial velocity is the biggest factor
 * 10) When temperature of some poles increase, its elastic potential energy increases.
 * 11) 9.5
 * 12) His speed was faster, 11
 * a.
 * 1) [[image:Screen_shot_2011-01-07_at_7.52.01_AM.png]]

There is a limit to the height pole vaulters have been able to attain due to their initial velocity and the pole that they are using. Even if the pole was 100 meters tall, the height they reach is based on their initial velocity, that energy is used and transformed into other forms of energy such as GPE and W.
 * What do you think now?**