this physics question .
1) The coefficient of kinetic friction between tires and a
typical road (asphalt) is µk = 0.55. Depending on the tires as well
as road conditions, µk can vary by as much as 25%. Based on this
information, the defense lawyer of a speeding ticket case argues
that the prosecutor interpretation of the tire marks -- providing
the vehicle stoppage distance -- is unreliable. Determine if the
defense argument is valid on a horizontal as well as on an inclined
road (angle between road surface and horizontal direction is at
most 10°). Consider that the vehicle was in a 25mph speed limit
zone and the tires left a 15-meters long mark on the road .
- Can You Explain Step By Step How This Person Solved This Physics Question 1 The Coefficient Of Kinetic Friction Bet 1 (581.53 KiB) Viewed 25 times
- Can You Explain Step By Step How This Person Solved This Physics Question 1 The Coefficient Of Kinetic Friction Bet 2 (654.08 KiB) Viewed 25 times
ok, ve 11.02m/s <w=11. 176 m/s (speed Limit) From figure V mg Sing - ma Co2 9 - On inclination Cassume up, since mal mentionel specifically). , mg Sino + le mg Coso are, a= g g Sing+ llag Coso Figure If, l = 0.4125 ,O= 10° a= 9.81 Sin loo +0.4125X9.81 Cooloº az 5.689 me Now, v=has J215689)X15 Oreg V=13.06 m/s Also, ple=0.5897536-15 az 9.81 Sin 10° +0.6875 X9.81 Cosloo Ore ga = 8.345 m/s2 Nowy V 120 8 = Jac8345) (5) = (15 Okey &= 15.82 m/s Both speeds, 15.82 and 13.06 are more than speed limit, W'=11176 m/s. So, argument not valid SAW