om rest picks up at a uniform rate and passes three electric posts in succession. The posts are 360 m apart along a street road. The car takes 10 s to travel from the first post to the second post and 6 seconds to go from the second post to the third post.

om rest picks up at a uniform rate and passes three electric posts in succession. The posts are 360 m apart along a street road. The car takes 10 s to travel from the first post to the second post and 6 seconds to go from the second post to the third post.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter4: Two-and-three Dimensional Motion

Section: Chapter Questions

Problem 45PQ: Pete and Sue, two reckless teenage drivers, are racing eastward along a straight stretch of highway....

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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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A car starting from rest picks up at a uniform rate and passes three electric posts in succession. The posts are 360 m apart along a street road. The car takes 10 s to travel from the first post to the second post and 6 seconds to go from the second post to the third post.

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