Flying Circus of Physics Brake or turn? The figure depicts an overhead view of a car's...

Question

Question

Answer 1

Answer #1

a] Work done by friction force = change in KE

-Friction*d = 0-0.5mv0^2

friction*111 = 0.5*1430*35^2

friction = 0.5*1430*35^2/111 = 7891 N

b] maximum possible static friction fs,max = us mg = 0.540*1430*9.8 = 7567.56 N

c] acceleration a= -uk*g = -0.4*9.8 = -3.92 m/s^2

by third equation of motion, v = sqrt(u^2+2as) = sqrt(35^2+2*-3.92*111) = 18.835 m/s answer

d] friction force = mv0^2/d = 1430*35^2/111 = 15781 N

Answer 2

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