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A ship steams at a constant velocity of 30 km/h. (a) How far does it travel in a day? (h) How long does it take to travel 500 km?

A ship steams at a constant velocity of 30 km/h. (a) How far does it travel in a day? (h) How long does it take to travel 500 km?

College Physics
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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21 all Supplementary Proble. chegg.com Supplementary Problems A ship steams at a constant velocity of 30 km/h. (a) How far does it travel in a day? (h) How long does it take to travel 500 km? 3.2. A car moves at 50 km/h for hand then at 60 km/h for 2 h. (a) How far did it go? (b) What was its average velocity for the entire trip? A woman jogs halfway home at 8 km/h and walks the rest of the way at 6 km/h. Find her average velocity for the entire trip. 3,4. An airplane whose airspeed is 500 km/h covers a distance of 1000 km in 24 h. How strong was the headwind against it? A boat moving downstream (with the current) in a river takes 4 min 7 s to cover a measured mile according to marks on shore, and 7 min 30 s to cover the same distance moving upstream (against the current). If the boat's velocity relative to the water is 11 mi/h, what is the velocity of the current in the river? 3.6. How long does it take an echo to return to a woman standing 300 m from a cliff? The velocity of sound in air is about 343 m/s. 3.7. A car moving at 100 km/h is 80 km behind another car moving at 60 km/h in the same direction. How far does the first car travel before it overtakes the second car? S.8. A pitcher takes 0.1 s to throw a baseball, which leaves his hand at a velocity of 30 m/s. What is the acceleration of the baseball while it is being thrown? A car comes to a stop in 6 s from a velocity of 30 m/s. (a) What is its acceleration? (b) At the same acceleration, how long would it take the car to come to a stop from a velocity of 40 m/s? 3.9. The brakes of a car can slow it down from 60 to 40 km/h in 2 s. How long will it take to bring the car to a stop from an initial velocity of 25 km/h at the same acceleration? 3.11. An object starts from rest with an acceleration of 10 m/s'. (a) How far does it go in 0.5 s? (b) What is its velocity after 0.5 s? 3.12. A car has an initial velocity of 10 m/s when it begins to be accelerated at 2.5 m/s. (a) How long does it take to reach a velocity of 25 m/s? (h) How far does it go during this period? The brakes of a car moving at 14 m/s are applied, and the car comes to a stop in 4 s. How far does the car go while it is slowing down from 14 to 10 m/s? This question hasn't been answered yet
Transcribed Image Text:21 all Supplementary Proble. chegg.com Supplementary Problems A ship steams at a constant velocity of 30 km/h. (a) How far does it travel in a day? (h) How long does it take to travel 500 km? 3.2. A car moves at 50 km/h for hand then at 60 km/h for 2 h. (a) How far did it go? (b) What was its average velocity for the entire trip? A woman jogs halfway home at 8 km/h and walks the rest of the way at 6 km/h. Find her average velocity for the entire trip. 3,4. An airplane whose airspeed is 500 km/h covers a distance of 1000 km in 24 h. How strong was the headwind against it? A boat moving downstream (with the current) in a river takes 4 min 7 s to cover a measured mile according to marks on shore, and 7 min 30 s to cover the same distance moving upstream (against the current). If the boat's velocity relative to the water is 11 mi/h, what is the velocity of the current in the river? 3.6. How long does it take an echo to return to a woman standing 300 m from a cliff? The velocity of sound in air is about 343 m/s. 3.7. A car moving at 100 km/h is 80 km behind another car moving at 60 km/h in the same direction. How far does the first car travel before it overtakes the second car? S.8. A pitcher takes 0.1 s to throw a baseball, which leaves his hand at a velocity of 30 m/s. What is the acceleration of the baseball while it is being thrown? A car comes to a stop in 6 s from a velocity of 30 m/s. (a) What is its acceleration? (b) At the same acceleration, how long would it take the car to come to a stop from a velocity of 40 m/s? 3.9. The brakes of a car can slow it down from 60 to 40 km/h in 2 s. How long will it take to bring the car to a stop from an initial velocity of 25 km/h at the same acceleration? 3.11. An object starts from rest with an acceleration of 10 m/s'. (a) How far does it go in 0.5 s? (b) What is its velocity after 0.5 s? 3.12. A car has an initial velocity of 10 m/s when it begins to be accelerated at 2.5 m/s. (a) How long does it take to reach a velocity of 25 m/s? (h) How far does it go during this period? The brakes of a car moving at 14 m/s are applied, and the car comes to a stop in 4 s. How far does the car go while it is slowing down from 14 to 10 m/s? This question hasn't been answered yet
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