1. A clock has a 20 cm minute hand. From the 3 mark to the 6 mark, for the tip of the minute hand: Express your answers in units of cm, min a. Graphically label the displacement vector, average velocity vector, and the average acceleration vector. b. Calculate the average velocity vector in unit-vector notation. c. Calculate the average acceleration vector in unit-vector notation. Y 12 13

1. A clock has a 20 cm minute hand. From the 3 mark to the 6 mark, for the tip of the minute hand: Express your answers in units of cm, min a. Graphically label the displacement vector, average velocity vector, and the average acceleration vector. b. Calculate the average velocity vector in unit-vector notation. c. Calculate the average acceleration vector in unit-vector notation. Y 12 13

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 12CQ: A child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around...

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A child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around a level track with two nearly straight sections and two nearly semicircular sections, as shown in the aerial view of Figure CQ7.12. (a) What are the directions of his velocity at points A, B, and C? For each point, choose one: north, south, east, west, or nonexistent, (b) What are the directions of his acceleration at points A, B, and C? Figure CQ7.12
A train leaving Albuquerque travels 293 miles, due east, to Amarillo. The train spends a couple of days at the station in Amarillo and then heads back west 107 miles where it stops in Tucumcari. Suppose the positive x direction points to the east and Albuquerque is at the origin of this axis. a. What is the total distance traveled by the train from Albuquerque to Tucumcari? b. What is the displacement of the train for the entire journey? Give both answers in appropriate SI units.
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1. If you walk 500 m due North and then 200 m due South,a. What is your total distance covered?b. What is your displacement? 2. A spacecraft traveling at 1200 m/s is uniformly accelerated at the rate of 150 m/s2 by burning itssecond stage rocket. If the rocket burns for 18 seconds, what is the final speed of the craft?
1)An airplane starting from airport A flies 300 km east, then 350 km at 30.0° west of north, and then 150km north to arrive finally at airport B. (a) The next day, another plane flies directly from A to B in astraight line. In what direction should the pilot travel in this direct flight? (b) How far will the pilot travelin this direct flight?
6. The instantaneous speed of a figure that describes a plane trajectory is v=ti + 2tj (m/s). ( THE v ,i and the j both have arrow above them) a) Calculate the numerical value of the speed at t = 1 s and at t = 5 s. b) What is the average acceleration vector in that time interval? c) What is the acceleration at t = 5s?
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1. A foot ball is kicked vertically upward from the ground and a student gazing at a window sees it coming upward passed him at 16 ft/sec^2. The window is 30 ft above the ground. a) how high does the ball go above the ground? b) how long does it take to go from a height of 30 ft to the highest point?
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1. An object moves on a horizontal coordinate line. Its directed distance s from the origin at theend of t seconds is t^3 − 6t^2 + 9t feet.(a) When is the object moving to the left?(b) What is the acceleration when its velocity is equal to zero?(c) When is the acceleration positive?(d) When is its speed increasing?
1. Whats is the distance traveled? 2. What is the magnitude of the acceleration?