A driver of a car going 21 m/s suddenly sees the lights of a barrier 40 meters ahead. It takes 0.75 seconds before the driver realizes that he should hit his brakes. Once he begins breaking, the average acceleration the car produces is - 10 m/s^2. How far did the car travel while the driver was "realizing" that he needed to start braking? How far does the car travel once he hits the brakes? Did the car hit the barrier?
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.
A driver of a car going 21 m/s suddenly sees the lights of a barrier 40 meters ahead. It takes 0.75 seconds before the driver realizes that he should hit his brakes. Once he begins breaking, the average acceleration the car produces is - 10 m/s^2.
- How far did the car travel while the driver was "realizing" that he needed to start braking?
- How far does the car travel once he hits the brakes?
- Did the car hit the barrier?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
