Posted by Mike on Thursday, June 14, 2012 at 11:49am.
A 1400kg car rounds a curve of 57m banked at an angle of 14 degrees.
If the car is traveling at 98km/h (27m/s), will a friction force be required? If so in what direction?
How much friction force will be required?

Physics  Elena, Thursday, June 14, 2012 at 1:07pm
Let the xaxis point toward the center of curvature and the yaxis point upward. Use Newton’s second law.
ΣFy = N• cosθ − mg − f •sinθ = 0 ...(1)
ΣFx = N• sinθ + f •cosθ = m•v²/R,....(2)
Solving the 1st equation for N, we obtain
N =( f •sin θ + m•g)/cos θ,
Substitute N to the 2nd equation and obtain friction force
f =m[(v²•cosθ/R)  g•sinθ].

Physics  darabee, Saturday, April 5, 2014 at 1:17am
f=[fy.fx].N

Physics  Anonymous, Saturday, November 15, 2014 at 2:05pm
this sucks. no help at all
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