6) Suppose you followed the following schedule this evening: You left your dorm at 3:00 pm, and studied in the library 200 m East of there. You then went to office hours 100 m North of the Library at 4:15 pm, then to class another 50 m North at 6:00 pm. After you finish your exam, you return to the dorm at 8:00 pm What are your average speed and

6) Suppose you followed the following schedule this evening: You left your dorm at 3:00 pm, and studied in the library 200 m East of there. You then went to office hours 100 m North of the Library at 4:15 pm, then to class another 50 m North at 6:00 pm. After you finish your exam, you return to the dorm at 8:00 pm What are your average speed and

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter3: Motion Along A Straight Line

Section: Chapter Questions

Problem 84AP: Unreasonable Results A cyclist rides 16.0 km east, then 8.0 km west, then 8.0 km east, then 32.0 km...

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4. At 12:00 noon, an arctic explorer starts heading back to his base camp located 5.15 km due north, when a snowstorm suddenly rolls in. Due to poor visibility, he ends up walking 6.22 km at 15.0o east of north until the storm breaks. a) After the storm breaks, how far and in what direction must he walk to get back to his camp? b) If he walks at a constant speed and gets back to his camp at 2:30 PM, at what time (to the nearest minute) did the storm break?
A boat moves at a distance (in km) of S(t) = t2 - 400t where t in minutes is the time passed since the boat started moving at 6:00 AM. What is the velocity of the train at exactly 9:00 AM?
In an experiment, a shearwater (a seabird) was taken from its nest, flown 5150 km away, and released. The bird found its way back to its nest 13.5 days after release. If we place the origin at the nest and extend the +x-axis to the release point, what was the bird’s average velocity in m/s (a) for the return flight and (b) for the whole episode, from leaving the nest to returning?
In an experiment, a shearwater (a seabird) was taken from its nest, flown a distance 5190 kmkm away, and released. It found its way back to its nest 13.5 daysdays after release. If we place the origin in the nest and extend the +x+x-axis to the release point, what was the bird's average velocity for the return flight? Express your answer in meters per second. vav.−xvav.−x = ________________ m/s What was the bird's average velocity for the whole episode, from leaving the nest to returning? Express your answer in meters per second. vav.vav. = __________________ m/s
A World War II bomber flies horizontally over level terrain with a speed of 275 m/s relative to the ground and at an altitude of 3.00 km The bombardier releases one bomb. (a) How far does the bomb travel horizontally between it release and its impact on the ground? Ignore the effects of air resistance. (b) The pilot maintains the planes original course, altitude, and speed through a storm of flak. Where is the plane when the bomb hits the ground? (c) The bomb hits the target seen in the telescopic bombsight at the moment of the bombs release. At what angle from tin- vertical was the bombsight set?
Professional baseball player Nolan Ryan could pitch a baseball at approximately 160.0 km/h. At that average velocity, how long did it take a ball thrown by Ryan to reach home plate, which is 18.4 m from the pitcher’s mound? Compare this with the average reaction time of a human to a visual stimulus, which is 0.25 s.
A football player runs from his own goal line to the opposing teams goal line, returning to the fifty-yard line, all in 18.0 s. Calculate (a) his average speed, and (b) the magnitude of his average velocity. (Sec Section 2.2)
Give an example in which velocity is zero yet acceleration is not.
Find the following for path A in Figure 3.54: (a) the total distance traveled, and (b) the magnitude and direction of the displacement from start to finish.
Is it possible for velocity to be constant while acceleration is not zero? Explain.
In World War II, there were several reported cases of airmen who jumped from their flaming airplanes with no parachute to escape certain death. Some fell about 20,000 feet (6000 m), and some of them survived, with few life-threatening injuries. For these lucky pilots, the tree branches and snow drifts on the ground allowed their deceleration to be relatively small. If we assume that a pilot's speed upon impact was 123 mph (54 m/s), then what was his deceleration? Assume that the trees and snow stopped him over a distance of 3.0 m.
A person lakes a trip, driving with a constant speed of 89.5 km/h, except, for a 22.0-min rest stop. If the persons average speed is 77.8 km/h, (a) how much time is spent on the trip and (b) how far does the person travel?