In World War II, there were several reported cases ofairmen who jumped from their flaming airplanes with noparachute to escape certain death. Some fell about 20,000feet (6000 m), and some of them survived, with few lifethreatening injuries. For these lucky pilots, the tree branchesand snow drifts on the ground allowed their deceleration to berelatively small. If we assume that a pilot’s speed upon impactwas 123 mph (54 m/s), then what was his deceleration?Assume that the trees and snow stopped him over a distanceof 3.0 m.
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.
In World War II, there were several reported cases of
airmen who jumped from their flaming airplanes with no
parachute to escape certain death. Some fell about 20,000
feet (6000 m), and some of them survived, with few lifethreatening injuries. For these lucky pilots, the tree branches
and snow drifts on the ground allowed their deceleration to be
relatively small. If we assume that a pilot’s speed upon impact
was 123 mph (54 m/s), then what was his deceleration?
Assume that the trees and snow stopped him over a distance
of 3.0 m.
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