### Boat Rowing in a River: Problem SetA boat can be rowed at **7.5 km/h** in still water.#### (a) Downstream Rowing Time**Question:** How much time (in minutes) is required to row **2.5 km** downstream in a river moving **2.9 km/h** relative to the shore? (Assume the river is flowing toward the east.)- **Answer:** [ ] min#### (b) Return Trip Time**Question:** How much time (in minutes) is required for the return trip?- **Answer:** [ ] min#### (c) Angle for Northward Rowing**Question:** In what direction must the boat be aimed to row north straight across the river? (Enter your angle in degrees counterclockwise from the east axis.)- **Answer:** [ ] ° counterclockwise from the east axis#### (d) Speed and Time Across the River**Given:** The river is **0.6 km** wide.1. **Question:** What is the speed of the boat with respect to Earth (in km/h)? (Assume the boat is aimed in the direction such that it will be rowed straight across the river.) - **Answer:** [ ] km/h2. **Question:** How much time (in minutes) is required to get to the opposite shore? - **Answer:** [ ] min#### (e) Straight Across Rowing1. **Question:** Suppose, instead, the boat is aimed straight across the river. How much time (in minutes) is required to get across? - **Answer:** [ ] min2. **Question:** How far downstream (in km) is the boat when it reaches the opposite shore? - **Answer:** [ ] km

Given that the boat can be rowed at 7.5 km/h in still water.

A boat can be rowed at 7.5 km/h in still water. (a) How much time (in min) is required to row 2.5 km downstream in a river moving 2.9 km/h relative to the shore? (Assume the river is flowing toward the east.) min (b) How much time (in min) is required for the return trip? min (c) In what direction must the boat be aimed to row north straight across the river? (Enter your angle in degrees counterclockwise from the east axis.) ° counterclockwise from the east axis

A boat can be rowed at 7.5 km/h in still water. (a) How much time (in min) is required to row 2.5 km downstream in a river moving 2.9 km/h relative to the shore? (Assume the river is flowing toward the east.) min (b) How much time (in min) is required for the return trip? min (c) In what direction must the boat be aimed to row north straight across the river? (Enter your angle in degrees counterclockwise from the east axis.) ° counterclockwise from the east axis

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

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