Supplementary Problems3.1.A ship steams at a constant velocity of 30 km/h. (a) How far does it travel in a day? (b) How long does it take to travel500 km?A car moves at 50 km/h for h and then at 60 km/h for 2 h. (a) How far did it go? (b) What was its average velocityfor the entire trip?32.3.3. 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 theentire 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 againstit?3.5.A boat moving downstream (with the current) in a river takes 4 min 7 s to cover a measured mile according to markson shore, and 7 min 30 s to cover the same distance moving upstream (against the current). If the boat's velocityrelative 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 about343 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 thefirst car travel before it overtakes the second car?3.8. 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 ofthe baseball while it is being thrown?3.9. 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, howlong would it take the car to come to a stop from a velocity of 40 m/s?3.10. 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 froman 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 velocityafter 0.5 s?

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

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter1: Units And Measurement

Section: Chapter Questions

Problem 32P: A car is traveling at a speed of 33 m/s. (a) What is its speed in kilometers per hour? (b) Is it...

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Supplementary Problems 3.1. A ship steams at a constant velocity of 30 kmh. (a) How far does it travel in a day? (b) How long does it take to travel 500 km? 3.2. A car moves at 50 kmh for h and then at 60 kmh for 2 h. (a) How far did it go? (b) What was its average velocity for the entire trip? 33. A woman jogs halfway home at 8 kmh and walks the rest of the way at 6 km/h. Find her average velocity for the entire trip. 34. An airplane whose airspeed is 500 km/h covers a distance of 1000 km in 24 h. How strong was the headwind against it? 3.5. Aboat 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 mih, 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…
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