## Energy with Hot Wheels
Presenter: Andy Jackson - the components of a system are defined;
- instruments are selected and used to extend observations and measurements of mass, volume, temperature, heat exchange, energy transformations, motion, fields, and electric charge;
- information is recorded and presented in an organized format;
- metric units are used in all measurements and calculations;
- the limitations of the experimental apparatus and design are recognized;
- the limitations of measured quantities are recognized through the appropriate use of significant figures or error ranges;
- data gathered from non-SI instruments are incorporated through appropriate conversions; and
- appropriate technology including computers, graphing calculators, and probeware, is used for gathering and analyzing data and communicating results.
PH.2 The student will investigate and understand how to analyze and interpret data. Key concepts include - a description of a physical problem is translated into a mathematical statement in order to find a solution;
- linear motion;
- uniform circular motion;
- projectile motion;
- Newton’s laws of motion;
- gravitation;
- planetary motion; and
- work, power, and energy.
PH.6 The student will investigate and understand that quantities including mass, energy, momentum, and charge are conserved. Key concepts include - kinetic and potential energy;
- Conservation of Mechanical Energy
- put the settings in KPH and
- this puts the gun in Km/hr and a 1:64 scale setting
- aim the gun at the track so the car heads towards the gun
- pull the trigger, release the car. Hold the trigger until the car passes.
- release the trigger.
- The speed displayed is the highest speed the gun recorded.
- divide number by 64 to get actual speed in Km/hr
I I. Conservation of Energy and projectile motion Using the hill from part I add a ramp to the track. Measure the height at the end of the launching ramp. A. Make sure and hold the ramp stable as the car goes down the track. By trial and error determine the maximum distance apart the ramps can be positioned. . Use the projectile motion equations to determine the correct position of the landing ramp. C . Evaluate the success of your calculations by calculating the relative error for the difference between the ramps. How many cm closer or farther apart do the ramps need to be to maximize the jump. Is this due to error or mistake?D I I I. Conservation of Energy and a vertical loop. Replace the ramps with the vertical loop so the set up looks like thisA |

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