Dynamics
posted by DHilsath on .
a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. 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) 
1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. 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

Please help me to elaborate the answer as i tried but couldn't