A 1500 kg automobile is traveling upto 20 deg inclined at a speed of 6 m/sec.
If the driver wishes to stop his car in a distance of 5m,determine the frictional force at
pavement which must be supplied by rear wheels.
KE=PE+W(fr)
m•v²/2 =m•g•h+F(fr) •s,
F(fr) =m(v²/2•s – g/ sinα)