You're designing a highway so that the maximum centripetal acceleration on a curve is no more than 1.3 m/s^2. What is the minimum curvature radius to accommodate a 108 km//h maximum speed? This is about r=V^2/a, right? I have to convert km to meters, then hours to min to seconds. Say the final is (30m/s)^2 /1/3 m/s^2 =692.3 m Does two sig figs mean that 692 is changed to 690 m or something else to get two sig figs? Please explain? If the answer is 62.3 then two figs mean 62. If 63.5, then 64. But 692?
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
You're designing a highway so that the maximum centripetal acceleration on a curve is no more than 1.3 m/s^2.
What is the minimum curvature radius to accommodate a 108 km//h maximum speed?
This is about r=V^2/a, right?
I have to convert km to meters, then hours to min to seconds. Say the final is (30m/s)^2 /1/3 m/s^2 =692.3 m
Does two sig figs mean that 692 is changed to 690 m or something else to get two sig figs? Please explain? If the answer is 62.3 then two figs mean 62. If 63.5, then 64. But 692?
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