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Mousetrap powered cars! Mousetrap powered cars! Why?? Mousetrap powered cars! • Physics: Potential and kinetic energies and kinetic friction. • Critical Skills: Critical thinking and organization. • Life Skills: Quality work, Collaboration and sportmanship. Mousetrap powered cars! • The targeted knowledge/understanding: – Understand and predict the transfer of these energies. – Recognize the similarity between the potential energy of a spring and kinetic energy. Mousetrap powered cars! • Calculations from mousetrap cars – – – – – – – – Total Rolling Friction Coefficient of Rolling Friction Total Potential Energy Maximum Total Kinetic Energy Work Done Moving Car Gear Ratios Mouse Trap Spring Constant Rotational Inertia of Wheels Mousetrap powered cars! • Calculations from mousetrap cars (cont) – – – – – – – – – Pulling Distance and Gear Ratio Max Acceleration before Tire Slippage Predicted Total Travel Distance Efficiency with Distance Cars Efficiency with Speed Cars Center of Mass Normal force on Wheels Min String Tension Needed to Move Calculate Tire Grip on Floor Mousetrap powered cars! • Graphing Ideas for mousetrap powered cars – – – – – – distance vs. time velocity vs. time acceleration vs. time pulling force vs. degrees of spring angle potential energy vs. time kinetic energy vs. time Mousetrap powered cars! • Graphing Ideas for mousetrap powered cars . (Cont.) – – – – work vs. time string tension vs. traveled distance lever arm length vs. time lever arm length vs. pulling distance Mousetrap powered cars! • I could easily keep you busy on just mouse trap cars till winter break!!! Mousetrap powered cars! • A few of the terms • Kinetic Energy – The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed. – KE = 1/2mv2 Mousetrap powered cars! • A few of the terms • Potential Energy – The energy of a particle or system of particles derived from position, or condition, rather than motion – U = mgh, where U is the potential energy in joules; m, is mass in kilograms; g is the acceleration of free fall; and h is height in meters. Mousetrap powered cars! • A few of the terms • Friction – A force that resists the relative motion or tendency to such motion of two bodies or substances in contact.
