A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 7 minutes. During the swim she is swept downstream 450 meters. A. Draw a useful picture depicting this situation. B. How fast is the river flowing? C. How fast can she swim in still water? D. What is her velocity (magnitude and direction) according to an observer on the shore?
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.
A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 7 minutes. During the swim she is swept downstream 450 meters.
A. Draw a useful picture depicting this situation.
B. How fast is the river flowing?
C. How fast can she swim in still water?
D. What is her velocity (magnitude and direction) according to an observer on the shore?
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