84. Unreasonable Results A cyclist rides 16.0 km east, then 8.0 km west, then 8.0 km east, then 32.0 km west, and finally 11.2 km east. If his average velocity is 24 km/ h, how long did it take him to complete the trip? Is this a ils yow orb to 190 reasonable time?
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.
![velocity, how long did it take a ball
reach home plate, which is 18.4 m from the pitcher'
mound? Compare this with the average reaction time of a
human to a visual stimulus, which is 0.25 s.
83. An airplane leaves Chicago and makes the 3000-km
trip to Los Angeles in 5.0 h. A second plane leaves Chicago
one-half hour later and arrives in Los Angeles at the same
time. Compare the average velocities of the two planes.
Ignore the curvature of Earth and the difference in altitude
between the two cities.
84. Unreasonable Results A cyclist rides 16.0 km east,
then 8.0 km west, then 8.0 km east, then 32.0 km west,
and finally 11.2 km east. If his average velocity is 24 km/
h, how long did it take him to complete the trip? Is this a
reasonable time?
85. An object has an acceleration of +1.2 cm/s².
At
t = 4.0 s, its velocity is -3.4 cm/s. Determine the
object's velocities at t = 1.0 s and t = 6.0 s.
86. A particle moves along the x-axis according to the
equation x(t) = 2.0-4.0t2 m. What are the velocity and
acceleration at t = 2.0 s and t = 5.0 s?
87. A particle moving at constant acceleration has
velocities of 2.0 m/s at t = 2.0 s and -7.6 m/s
t = 5.2 s. What is the acceleration of the
at
88. A train in
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