A footballer kicks a ball directly towards a wall 10m away and walks after the ball in the same direction at a constant speed 2m/s. The ball starts at 4m/s, but decelerates at a constant rate of 0.5m/s^2. When it hits the wall it rebounds to travel away from the wall at the same speed with which it hit the wall. a) Find the time after initial kick when the ball returns to the footballer. b) what assumptions have been made in your answer?
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.
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