06_P21InstructorSolution - 6.21 Model The car is a particle...

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6.21. Model: The car is a particle subject to Newton’s laws and kinematics. Visualize: Solve: Kinetic friction provides a horizontal acceleration which stops the car. From the figure, applying Newton’s first and second laws gives k x x Ff m a =− = GG 0 y FnF nFm g =− =⇒= = Combining these two equations with kk f n μ = yields () ( ) 2 k 0.50 9.80 m/s 4.9 m/s x ag Kinematics can be used to determine the initial velocity.
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This note was uploaded on 12/10/2011 for the course PHYS 1211 taught by Professor Geller during the Fall '09 term at UGA.

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