▼ Part A Constants How much time does it take the walker to make the round trip? Two piers, A and B, are located on a river: B is 1500 m downstream from A (Figure 1). Two friends must make round trips from pier A to pier B and return. One rows a boat at a constant speed of 4.00 km/h relative to the water; the other walks on the shore at a constant speed of 4.00 km/h. The velocity of the river is 2.80 km/h in the direction from A to Express your answer using two significant figures. min Submit Request Answer Figure 1 of 1 ▼ Part B How much time does it take the rower to make the round trip? Express your answer using two significant figures. 1500 m min U cunrent Submit Request Answer

▼ Part A Constants How much time does it take the walker to make the round trip? Two piers, A and B, are located on a river: B is 1500 m downstream from A (Figure 1). Two friends must make round trips from pier A to pier B and return. One rows a boat at a constant speed of 4.00 km/h relative to the water; the other walks on the shore at a constant speed of 4.00 km/h. The velocity of the river is 2.80 km/h in the direction from A to Express your answer using two significant figures. min Submit Request Answer Figure 1 of 1 ▼ Part B How much time does it take the rower to make the round trip? Express your answer using two significant figures. 1500 m min U cunrent Submit Request Answer

Physics for Scientists and Engineers

10th Edition

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Vectors

Section: Chapter Questions

Problem 46CP: A pirate has buried his treasure on an island with five trees located at the points (30.0 m, 20.0...

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Jim is driving his car at 32m/s (72mi/h) along a highway where the speed limit is 25m/s (55mi/h). A highway patrol car observes him pass and quickly reaches a speed of 36m/s. At that point, Jim is 300m ahead of the patrol car. How far does the patrol car travel before catching Jim?
An inquisitive physics student and mountain climber climbs a 51.0-m-high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.06 m/s. (a) How long after release of the first stone do the two stones hit the water?
A football quarterback is moving straight backward at aspeed of 2.00 m/s when he throws a pass to a player 18.0 mstraight downfield. (a) If the ball is thrown at an angle of 25ºrelative to the ground and is caught at the same height as it isreleased, what is its initial speed relative to the ground? (b)How long does it take to get to the receiver? (c) What is itsmaximum height above its point of release?
The bacterium Escherichia coli (or E. coli) is a single-celled organism thatlives in the gut of healthy humans and animals. When grown in a uniform medium rich in salts and amino acids, it swims along zig-zag paths at a constant speed changing direction at varying time intervals. As shown the positions of an E. coli as it moves from point A to point J. Each segment of the motion can be identified by two letters, such as segment BC. During which segments, if any, does the bacterium have the samea. Displacement? b. Speed? c. Velocity?
3. A building is 46.0 m tall. A jealous boyfriend wishes to drop a tomato from the top of the building onto the head of his girlfriend’s suitor, who is 1.80 m and walking alongside the building at a constant speed of 1.20 m/s. How many meters should the suitor be from the position below the tomato when it is dropped? With complete solution
A pirate has buried his treasure on an island with five trees located at the points (30.0 m, 20.0 m), (60.0 m, 80.0 m). (10.0 m, 10.0 m), (40.0 m, 30.0 m), and (70.0 m, 60.0 m), all measured relative to some origin, as shown in Figure P3.46. His ships log instructs you to start at tree A and move toward tree B, but to cover only one-half the distance between A and B. Then move toward tree C, covering one-third the distance between your current location and C. Next move toward tree D, covering one-fourth the distance between where you are and D. Finally move toward tree E, covering one-fifth the distance between you and E, stop, and dig. (a) Assume you have correctly determined the order in which the pirate labeled the trees as A, B, C, D, and E as shown in the figure. What are the coordinates of the point where his treasure is buried? (b) What If? What if you do not really know the way the pirate labeled the trees? What would happen to the answer if you rearranged the order of the trees, for instance, to B (30 m, 20 m), A (60 m, 80 m), E (10 m, 10 m), C (40 m, 30 m), and D (70 m, 60 m)? State reasoning to show that the answer does not depend on the order in which the trees are labeled. Figure P3.46
A hiker walks 2.00 km north and then 3.00 km east, all in 2.50 hours. Calculate the magnitude and direction of the hikers (a) displacement (in km) and (b) average velocity (in km/h) during those 2.50 hours, (c) What was her average speed during the same time interval?
A football quarterback is moving straight backward at a speed of 2.00 m/s when he throws a pass to a player 18.0 m straight downfield. (a) If the ball is thrown at an angle of 25° relative to the ground and is caught at the same height as it is released, what is its initial speed relative to the ground? (b) How long does it take to get to the receiver? (c) What is its maximum height above its point of release?
If you know the position vectors of a particle at two points along its path and also know the time interval during which it moved from one point to the other, can you determine the particles instantaneous velocity? Its average velocity? Explain.
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