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Physics 111: Elementary Mechanics – Lecture 4

Physics 111: Elementary Mechanics – Lecture 4. Carsten Denker NJIT Physics Department Center for Solar–Terrestrial Research. Newton’s Laws. If no net force acts on a body, then the body’s velocity cannot change.

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Physics 111: Elementary Mechanics – Lecture 4

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  1. Physics 111: Elementary Mechanics – Lecture 4 Carsten Denker NJIT Physics Department Center for Solar–Terrestrial Research

  2. Newton’s Laws • If no net force acts on a body, then the body’s velocity cannot change. • The net force on a body is equal to the product of the body’s mass and acceleration. • When two bodies interact, the forces on the bodies from each other are always equal in magnitude and opposite in direction. Center for Solar-Terrestrial Research

  3. Static & Kinetic Friction Static frictional force Kinetic frictional force Skid marks are 290 m long! k = 0.6 and a = const. How fast was the car going when the wheels became locked? Center for Solar-Terrestrial Research

  4. Drag Force and Terminal Speed Drag force Terminal speed Drag coefficient C, air density , and effective cross-section A. Center for Solar-Terrestrial Research

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