A small airplane flying horizontally with a speed of 179 mi/hr at an altitude of 280 ft above a remote valley drops an emergency medical package at A. The package has a parachute which deploys at B and allows the package to descend vertically at the constant rate of 6.2 ft/sec. If the drop is designed so that the package is to reach the ground 25 seconds after release at A, determine the horizontal lead L so that the package hits the target. Neglect atmospheric resistance from A to B. B. Target- L 179 mi/hr A 280'

A small airplane flying horizontally with a speed of 179 mi/hr at an altitude of 280 ft above a remote valley drops an emergency medical package at A. The package has a parachute which deploys at B and allows the package to descend vertically at the constant rate of 6.2 ft/sec. If the drop is designed so that the package is to reach the ground 25 seconds after release at A, determine the horizontal lead L so that the package hits the target. Neglect atmospheric resistance from A to B. B. Target- L 179 mi/hr A 280'

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter4: Motion In Two And Three Dimensions

Section: Chapter Questions

Problem 76P: A small plane flies at 200 km/h in still air. If the wind blows directly out of the west at 50 km/h,...

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Concept explainers

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

Question

Calculate the time t₁ at which the parachute opens.
BY
Target-
Answer: t₁ = i
L
sec
179 mi/hr
A
280'

A small airplane flying horizontally with a speed of 179 mi/hr at an altitude of 280 ft above a remote valley drops an emergency
medical package at A. The package has a parachute which deploys at B and allows the package to descend vertically at the constant
rate of 6.2 ft/sec. If the drop is designed so that the package is to reach the ground 25 seconds after release at A, determine the
horizontal lead L so that the package hits the target. Neglect atmospheric resistance from A to B.
B.
Target-
L
179 mi/hr
A
280'

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