50m in front of him. He slams on the brakes and skids towards the crevice. The coefficient of the friction between the car and the road is µ = 0.8.
How far does the car skid? Does the car go into the crevice?
How far does the car skid? Does the car go into the crevice?
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F_friction = Mu * F-Normal
F_n = MA = 1000 kg * 9.8 m/s^2 = 9800 N
F_f = 0.8 * 9800 = 7840 N
KE = 0.5MV^2
KE = 0.5 * 1000 * 20^2
KE = 200,000 J
KE = Work
Work = Force * distance
200,000 = 7840 N * D
D = 25.51 m
Yes, car stops in time
F_n = MA = 1000 kg * 9.8 m/s^2 = 9800 N
F_f = 0.8 * 9800 = 7840 N
KE = 0.5MV^2
KE = 0.5 * 1000 * 20^2
KE = 200,000 J
KE = Work
Work = Force * distance
200,000 = 7840 N * D
D = 25.51 m
Yes, car stops in time
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Invalid question- cars can't go 20m/s on a crevice ridden road!