Careless Doug is standing on the summit of Mount Whitney (elevation 14,505 ft) while his prudent friend Hal is back at their basecamp on the shore of Iceberg Lake (elevation 12,621 ft). According to Google Maps, the horizontal distance between them is 1997 ft. Suddenly, a storm blows up, and poor Doug is struck by lightning. How much time elapses between when Hal sees the strike and when he hears it?
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.
Careless Doug is standing on the summit of Mount Whitney (elevation 14,505 ft) while his prudent friend Hal is back at their basecamp on the shore of Iceberg Lake (elevation 12,621 ft). According to Google Maps, the horizontal distance between them is 1997 ft. Suddenly, a storm blows up, and poor Doug is struck by lightning. How much time elapses between when Hal sees the strike and when he hears it? Use 330 m/s for the speed of sound in the cold Sierra air.
![**Transcript:**
Careless Doug is standing on the summit of Mount Whitney (elevation 14,505 ft) while his prudent friend Hal is back at their basecamp on the shore of Iceberg Lake (elevation 12,621 ft). According to Google Maps, the horizontal distance between them is 1997 ft. Suddenly, a storm blows up, and poor Doug is struck by lightning. How much time elapses between when Hal sees the strike and when he hears it? Use 330 m/s for the speed of sound in the cold Sierra air.
**Sketch the situation, defining all your variables.**
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**What physics equation(s) will you utilize in order to solve this problem? For each equation you list, give a justification for why it applies to this situation.**
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**Apply your equation(s) to solve, first for an algebraic expression(s), then for any numerical answer(s). Show the units of your answer(s), and how you got them.**
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