A car is initially travelling due north at 22 m s-l. Find the velocity of the car after 4 s if its acceleration is 2 m s-2 due south. Sebuah kereta pada mulanya bergerak pada 22 m s- ke utara. Cari halaju kereta itu selepas 4 s jika pecutannya 2 m s2 ke selatan. A 14 m s- B 28 m s- C C 30 m s- HOTS Evaluating D 44 m s

A car is initially travelling due north at 22 m s-l. Find the velocity of the car after 4 s if its acceleration is 2 m s-2 due south. Sebuah kereta pada mulanya bergerak pada 22 m s- ke utara. Cari halaju kereta itu selepas 4 s jika pecutannya 2 m s2 ke selatan. A 14 m s- B 28 m s- C C 30 m s- HOTS Evaluating D 44 m s

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 36PE: An express train passes through a station. It enters with an initial velocity of 22.0 m/s and...

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This is a symbolic version of Problem 29. A river has a steady speed of vs. A student swims upstream a distance d and back to the starting point. (a) If the student can swim at a speed of v in still water, how much time tup does it take the student to swim upstream a distance d? Express the answer in terms of d, v, and vs. (b) Using the same variables, how much time tdown does it take to swim back downstream to the starting point? (c) Sum the answers found in parts (a) and (b) and show that the time ta required for the whole trip can be written as ta=2d/v1-vs2/v2 (d) How much time tb does the trip take in still water? (e) Which is larger, ta or tb? Is it always larger?
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