How Do You Calculate the Energy Stored in a Mousetrap for a Physics Project?

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SUMMARY

The energy stored in a mousetrap can be calculated by integrating the force exerted by the spring over the distance the bar moves, specifically from 0 to 180 degrees. The mousetrap produces a force of 5N at a 90-degree angle and 11N at a 180-degree angle, allowing for a linear extrapolation of force based on these measurements. To effectively utilize this energy in a mousetrap car, one can attach a lead weight to the bar, which, when released, propels the car forward. Evaluating different methods for converting stored spring energy into motion is essential for optimizing performance.

PREREQUISITES
  • Understanding of basic physics concepts, particularly energy and force.
  • Familiarity with integration techniques in calculus.
  • Knowledge of mechanical advantage principles.
  • Experience with constructing simple mechanical devices, such as mousetrap cars.
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  • Research how to calculate energy using integration in physics.
  • Explore the concept of mechanical advantage in simple machines.
  • Investigate different methods for converting spring energy into kinetic energy.
  • Learn about efficiency comparisons in mechanical systems.
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Students in physics classes, hobbyists building mousetrap cars, and educators teaching principles of energy conversion and mechanics.

jk_zhengli
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i have to make a mouse trap car in physics class and calculate a several things afterward. Anyone can help me to calculate the engergy stored n mouse trap based on measurements, ideal machanical advantages and percent efficiency. The mouse trap produces 5N at a 90 degree angle and 11N at a 180 degree angle.
 
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To calculate the energy stored in the spring, you would integrate the force multiplied by the distance as you push the bar from zero to 180 degrees. You can probably use a linear extrapolation of the force by angle, based on the two numbers you are given.

One simple way to make a mousetrap car is to put a lead weight on the bar (and wheels on the wood piece, obviously). Springing the trap will fling the lead weight backwards, and propel the car forwards. What other ways can you think of to convert the stored spring energy into motion? How can you compare the efficiencies of the different conversion mechanisms?
 

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