An attacker at the base of a castle wall 3.85 m high throws a rock straight up with speed 7.50 m/s from a height of 1.70 m above the ground. (a) Will the rock reach the top of the wall? Yes No x (b) If so, what is its speed at the top? If not, what initial speed must it have to reach the top? 49 x Your response differs from the correct answer by more than 10%. Double check your calculations. m/s. (c) Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.50 m/s and moving between the same two points. 992 x Your response differs from the correct answer by more than 100% m/s (d) Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations D Yes No (e) Explain physically why it does or does not agree. Show Transcribed Text
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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