Q15: A rock is thrown downward from the top of a 40.0-m- tall tower with an initial speed of 12 m/s. Assuming negligible air resistance, what is the speed of the rock just before hitting the ground? (a) 28 m/s (b)30 m/s (c) 56 m/s (d) 784 m/s (e) None
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.
![Q15: A rock is thrown downward from the top of a 40.0-m-
tall tower with an initial speed of 12 m/s. Assuming negligible
air resistance, what is the speed of the rock just before hitting
the ground?
(a) 28 m/s (b) 30 m/s (c) 56 m/s (d) 784 m/s (e) None](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcca3ad25-011b-4da2-ab50-7aff5437de00%2F6787d3ab-7f88-4581-b1fb-3fde50c8cb90%2Fe6q8m_processed.png&w=3840&q=75)
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