An automobile is traveling on a long, straight highway at a steady 76.0 mi/hwhen the driver sees a wreck 200 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and the wreck are two different surfaces. First there is 100 m of ice, where the deceleration is only 1.30 m/s2 . From then on, it is dry concrete, where the deceleration is a more normal 7.40 m/s2 Part A What was the car’s speed just after leaving the icy portion of the road? Part B What is the total distance her car travels before it comes to a stop? Part C What is the total time it took the car to stop?
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.
An automobile is traveling on a long, straight highway at a steady 76.0 mi/hwhen the driver sees a wreck 200 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and the wreck are two different surfaces. First there is 100 m of ice, where the deceleration is only 1.30 m/s2 . From then on, it is dry concrete, where the deceleration is a more normal 7.40 m/s2
Part A What was the car’s speed just after leaving the icy portion of the road?
Part B What is the total distance her car travels before it comes to a stop?
Part C What is the total time it took the car to stop?
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