You are working for the Highway Department. In mountainous regions, highways sometimes include a runaway truck ramp, and you are asked to help with the design of such a ramp. A runaway truck ramp is often a lane of gravel adjacent to a long downhill section of roadway where trucks with failing brakes may need assistance to stop. Working with your supervisor, you develop a worst-case scenario: a truck with a mass of 4.00 ✕ 104 kg enters a runaway truck lane traveling at 37.0 m/s. Experiments have shown that the coefficient of kinetic friction of truck tires moving through the gravel is 0.51. (a) Your supervisor asks you to advise her on the required length of a runaway truck lane on section of ground next to the roadway that rises at a constant angle of 29.0°. (Give the minimum length of the roadway required in m.) m (b) She also asks you to advise her on considerations to make about the runaway truck lanes if more massive trucks are
You are working for the Highway Department. In mountainous regions, highways sometimes include a runaway truck ramp, and you are asked to help with the design of such a ramp. A runaway truck ramp is often a lane of gravel adjacent to a long downhill section of roadway where trucks with failing brakes may need assistance to stop. Working with your supervisor, you develop a worst-case scenario: a truck with a mass of 4.00 ✕ 104 kg enters a runaway truck lane traveling at 37.0 m/s. Experiments have shown that the coefficient of kinetic friction of truck tires moving through the gravel is 0.51. (a) Your supervisor asks you to advise her on the required length of a runaway truck lane on section of ground next to the roadway that rises at a constant angle of 29.0°. (Give the minimum length of the roadway required in m.) m (b) She also asks you to advise her on considerations to make about the runaway truck lanes if more massive trucks are
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You are working for the Highway Department. In mountainous regions, highways sometimes include a runaway truck ramp, and you are asked to help with the design of such a ramp. A runaway truck ramp is often a lane of gravel adjacent to a long downhill section of roadway where trucks with failing brakes may need assistance to stop. Working with your supervisor, you develop a worst-case scenario: a truck with a mass of 4.00 ✕ 104 kg enters a runaway truck lane traveling at 37.0 m/s. Experiments have shown that the coefficient of kinetic friction of truck tires moving through the gravel is 0.51.
(a) Your supervisor asks you to advise her on the required length of a runaway truck lane on section of ground next to the roadway that rises at a constant angle of 29.0°. (Give the minimum length of the roadway required in m.)
m
(b) She also asks you to advise her on considerations to make about the runaway truck lanes if more massive trucks are approved and allowed to travel on this roadway.
The more massive the truck, the longer the roadway required.The more massive the truck, the shorter the roadway required. The roadway required does not depend on the mass of the truck.
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