3 AccelerometerYou are inside a freight car on a moving train. The train is traveling along a straight section of track over level ground.Initially, it moves along the track at a constant speed of 25 m/s- about 55 mph.A lightbulb hangs by its cord from the ceiling. There are no windows.(a) At what angle (with respect to vertical) does the lightbulb hang?Draw a free body diagram of the bulb.(b) Later, you look up and notice that the bulb hangs at a constant angle of 10° with respect to vertical. It is deflectedtoward the front of the train. Is the train speeding up or slowing down? What is the magnitude of the acceleration?Draw a free body diagram of the bulb.

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Answered: = the lightbulb hang?

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= the lightbulb hang?

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

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 26P: Figure P4.26 shows loads hanging from the ceiling of an elevator that is moving at constant...

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Concept explainers

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.

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3 Accelerometer
You are inside a freight car on a moving train. The train is traveling along a straight section of track over level ground.
Initially, it moves along the track at a constant speed of 25 m/s- about 55 mph.
A lightbulb hangs by its cord from the ceiling. There are no windows.
(a) At what angle (with respect to vertical) does the lightbulb hang?
Draw a free body diagram of the bulb.
(b) Later, you look up and notice that the bulb hangs at a constant angle of 10° with respect to vertical. It is deflected
toward the front of the train. Is the train speeding up or slowing down? What is the magnitude of the acceleration?
Draw a free body diagram of the bulb.

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