Chapter 1: Forces Define force Force: a push or a pull FORCE IS A VECTOR (HAS A SIZE & A DIRECTION) Units: Newtons 1 N = the force required to accelerate a 1 kg mass 1 m/s2 1 N= 0.225 lbs 1 lb = 4.448 N Classify forces Internal Forces: forces that act within the object of system whose motion is being investigated Pulling= tensile forces (putting the structure under tension) Pushing= compressive forces (putting the structure under compression) Internal forces hold things together when
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Biomechanics Lab Report By Connor Blakely Question 1) All figures given in metres. All players using lofted clubs (9 irons). Cody | Trial 1 | Trial 2 | Trial 3 | Average | Air Ball | 18.8 | 21.8 | 21.2 | 20.6 | Practice Ball | 39.2 | 37.9 | 62.8 | 46.63 | Golf Ball | 115.75 | 77.2 | 82.65 | 91.87 | Graph to Show Cody’s Results with the Different Balls Bailey | Trial 1 | Trial 2 | Trial 3 | Average | Air Ball | 18.3 | 25.5 | 23.65 | 22.48 | Practice Ball | 38.2 | 41
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Linear Momentum: Pi = Pf Pxi = Pxf Pyi = Pyf Pzi = Pzf Review 2. Two-body collision process: Linear momentum is conserved for a closed and isolated two-body system during collision because there is no net external force. Total kinetic energy of the system of two colliding bodies may or may not be conserved. If it is conserved‚ the collision is called an elastic collision. If the kinetic energy of the system is not conserved‚ the collision is called an inelastic collision. Completely
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Example problems involving collisions 1) On a horizontal frictionless surface a puck of mass m initially at speed u collides head-on (without rotation) with a stationary puck of mass M. Find the velocities of both puck after the collision if: i) the collision is fully elastic ii) the collision if fully inelastic. i) momentum: kinetic energy: mu = mv+MV (+ve in direction of initial u) 1 /2 m u2 = 1/2 m v2 + 1/2 M V2 2 eqns in 2 unknowns: V = (u - v) m/M substitute in K eqn: u2 = v2 + (M/m) V2 =
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1- A gas consists of molecules of mass (m) and diameter (d). 2- Molecules move continuously and randomly. 3- Molecules are treated as points‚ having no volume 4- Molecules collide with each other‚ changing direction and velocity. 5- Collisions are elastic (no loss of translational energy) no potential energy of interaction between them. Derivation of the ideal gas equation from the kinetic theory The model used for discussing the molecular basis of the physical properties of a perfect
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a Car Crash Extra Credit By: Natalie Weston In order to maximize the chance of survival during a collision‚ many automobile-safety features have been implemented over the past few years. Pliable sheet metal and frame structures that crumple during impact are just one of the various safety precautions taken. Because when an object stops‚ or is stopped by a collision‚ the same change in momentum occurs no matter the size of the force or the time interval‚ these sheets of metal are critical to the
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Classical Mechanics Problems David J. Jeffery Physics Department New Mexico Tech Socorro‚ New Mexico ♠ ♠ ♠ ♠ ♠ ♠ ♠ ♠ ♠ ♠ Portpentagram Publishing (self-published) 2001 January 1 Introduction Classical Mechanics Problems (CMP) is a source book for instructors of advanced classical mechanics at the Goldstein level. The book is available in electronic form to instructors by request to the author. It is free courseware and can be freely used and distributed‚ but not used
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The pendulum shows elastic collision and conserved momentum. In this set up‚ no momentum is actually lost. Ball 0 just transfers its momentum to stationary ball 1 which it collides with(head-on collision) so ball 0 is put to stop then ball 1 collides with ball 2 causing ball 1 to stop and transfer its momentum to ball 2 and so on until the momentum gets transferred to ball 4 then ball 3 collides with ball 2 and the cycle continues. Thoughts on KPUP Grading System As we all know
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located in the front part of the vehicle‚ in order to absorb the impact of a head-on collision‚ though they may be found on other parts of the vehicle as well. The core problem is that a typical car‚ weighing more than 4‚000 lbs. driving 60 mph has a huge amount of momentum. If a car hits something at that speed‚ all of the momentum is stopped with a massive amount of force required because change in momentum equals force multiplied by time. All of that force is then transferred to the passenger
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Physics “FORMULAS LIST “ | | | | | | | Quantity |Symbol |Formula | |% Error | |% Error = ( |A-M| ) x 100 /A | |% Uncertainty | |% Uncertainty = (Uncertainty
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