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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A carpenter accidentally dropped his hammer from the roof top of the house he is repairing. If the hammer hits the ground after 1.68 seconds, how high is the house?
- A student throws a set of keys vertically upward to her sorority sister who is in a window 4.00m above. The keys are caught 1.50s later by the sister’s outstretched hand. (a) With what initial velocity were the keys thrown? (b) What was the velocity of the keys just before they were caught?
- A particle moves according to the equation , where v is in meters per second and t is in seconds.
(a) Find the average acceleration for the time interval from 2.00s to 3.00s.
(b) Find the instantaneous acceleration at t = 2.00s and at t = 3.00s. - An object is at x = 0 at t = 0 and moves along the x axis. (a) What is the acceleration of the object between 0 and 4s? (b) What is the acceleration of the object between 4s and 9s? (c) What is the acceleration of the object between 13s and 18s? (d) At what time(s) is the object moving with the lowest speed?
- A jet plane comes in for a landing with a speed of 100m/s, and its acceleration can have a maximum magnitude of 5.00m/s2 as it comes to rest from the instant the plane touches the runway, what is the minimum time interval needed before it can come to rest?
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