A boat drives towards a lighthouse whose windows are located 60 m above sea level. From a window in the lighthouse you can see at 14.58 the boat at an angle of 9.8∘ below the horizontal plane. At 15.01 is the corresponding angle 32.4∘. How fast is the boat traveling? (Answer in km/h).

A boat drives towards a lighthouse whose windows are located 60 m above sea level. From a window in the lighthouse you can see at 14.58 the boat at an angle of 9.8∘ below the horizontal plane. At 15.01 is the corresponding angle 32.4∘. How fast is the boat traveling? (Answer in km/h).

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

Chapter9: Relativity

Section: Chapter Questions

Problem 17P

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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.

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