When a high-speed passenger train traveling at 161 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D=676 m ahead ( Fig. 2-20). The locomotive is movingat 29.0 km/h. The engineerof the high-speed train immediately applies the brakes . (a) What must be the magnitude of the resulting constant deceleration if a collision is to be justavoided ? (b) Assume that the engineer is at x=0 when , at t=0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.

When a high-speed passenger train traveling at 161 km/h rounds a bend,

1.	When a high-speed passenger train traveling at 161 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D=676 m ahead ( Fig. 2-20). The locomotive is movingat 29.0 km/h. The engineerof the high-speed train immediately applies the brakes . (a) What must be the magnitude of the resulting constant deceleration if a collision is to be justavoided ? (b) Assume that the engineer is at x=0 when , at t=0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.
Answer» ANSWER :(a) `-0.994 m//s^(4)`

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