At the end of a race a runner decelerates from a velocity of 8.70 m/s at a rate of 1.80 m/s2. A. How far in meters does she travel in the next 5.30 s? (Assume the deceleration of 1.80 m/s2is constant over the full 5.30 s.) B. What is her final velocity in m/s? C. Evaluate the result. Does it make sense? (Hint: what is the algebraic sign of the velocity, and what does it imply)
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.
- At the end of a race a runner decelerates from a velocity of 8.70 m/s at a rate of 1.80 m/s2.
A. How far in meters does she travel in the next 5.30 s? (Assume the deceleration of 1.80 m/s2is constant over the full 5.30 s.)
B. What is her final velocity in m/s?
C. Evaluate the result. Does it make sense? (Hint: what is the algebraic sign of the velocity, and what does it imply)
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