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physics

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A 2.1 103-kg car starts from rest at the top of a 5.9-m-long driveway that is inclined at 19° with the horizontal. If an average friction force of 4.0 103 N impedes the motion, find the speed of the car at the bottom of the driveway.

  • physics -

    PE=KE+W(fr)
    PE=m•g•h=m•g•s•sinα,
    KE = mv²/2,
    W(fr)=F(fr) •s•sinα.
    m•g•s•sinα=mv²/2+F(fr) •s•sinα.
    Solve for ‘v’

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