Posted by **Michael** on Monday, November 12, 2012 at 1:16pm.

A 76.3-kN car is travelling at 66.5 mph when the driver decides to exit the freeway by going up a ramp. After coasting 418 m along the exit ramp the car\'s speed is 27.3 mph, and it is h = 10.7 m above the freeway. What is the magnitude of the average drag force exerted on the car?

- Physics HW Help, Please -
**Elena**, Monday, November 12, 2012 at 1:46pm
mg=76300 N, m=76300/9.8 kg, s= 418 m,

v₀=66.5 mph =29.7 m/s

v=28.9 mph=12.2 m/s, h=10.7 m

KE1-KE2= W(dr)+ PE

m•v₀²/2 - m•v²/2= F(dr) •s +m•g•h

Solve for “F(dr)”

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