A cannon fires a shell straight upward; 1.7 s after is launched, the shell is moving upward with a speed of 16 m/s. Assuming air resistance is negligible, find the speed (magnitude of velocity) c the shell at launch and 5.2 s after the launch. (a) at launch

A cannon fires a shell straight upward; 1.7 s after is launched, the shell is moving upward with a speed of 16 m/s. Assuming air resistance is negligible, find the speed (magnitude of velocity) c the shell at launch and 5.2 s after the launch. (a) at launch

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Motion In Two Dimensions

Section: Chapter Questions

Problem 10P

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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

A cannon fires a shell straight upward; 1.7 s after
is launched, the shell is moving upward with a
speed of 16 m/s. Assuming air resistance is
negligible, find the speed (magnitude of velocity) c
the shell at launch and 5.2 s after the launch.
(a) at launch

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