A cargo helicopter, descending steadily at a speed of 4.8 m/s, releases a small package. Let upward be the positive direction for this problem. (a) If the package is 49 m above the ground when it is dropped, how long does it take for the package to reach the ground? ________ s (b) What is its velocity just before it lands? (Indicate the direction with the sign of your answer.) _________ m/s
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 cargo helicopter, descending steadily at a speed of 4.8 m/s, releases a small package. Let upward be the positive direction for this problem.
________ s
(b) What is its velocity just before it lands? (Indicate the direction with the sign of your answer.)
_________ m/s
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