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Posted by on Sunday, November 6, 2011 at 5:24pm.

A car is being driven along a country road on a dark and rainy night at a speed of 20 m/s. The section of road is horizontal and straight. The driver sees that a tree has fallen and covered the road ahead. Panicking, the driver locks the breaks at a distance of 20m from the tree. If the coefficient of friction between the wheels and road is 0.8, at what speed does the car crash into the tree?

  • Physics - , Sunday, November 6, 2011 at 5:55pm

    (Friction force)*(braking distance) = K.E. reduction

    Solve for the final kinetic energy and get the final V from that.

  • Physics - , Sunday, November 6, 2011 at 7:17pm

    post it.

  • Physics - , Sunday, July 5, 2015 at 8:28pm

    dfdf

  • Physics - , Friday, June 24, 2016 at 7:50am

    a car with mass mass of 1875 is traveling along a countr

  • Physics - , Friday, June 24, 2016 at 7:51am

    a car with mass mass of 1875 is traveling along a countr

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