06_P21InstructorSolution

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

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
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.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online