15. At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when the balls collide, (b) the height at which they collide, and (c) the direction the second ball is traveling when they collide. Take g 10 m/s?.
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.
![15. At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a
height of 40 m. At the same instant, another ball is thrown upward from ground
level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time
when the balls collide, (b) the height at which they collide, and (c) the direction the
second ball is traveling when they collide. Take g
10 m/s?.
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