A whale swims due east for a distance of 8.0 km in a time of 2.50 h. It then turns around and moves west for 2.0 km in a time of 0.50 h. It turns around again and heads 4.0 km due east in a time of 1.00 h. What is the total distance travelled by the whale. What is the total displacement? What is the average speed for the entire trip? What is the average velocity for the entire trip? There are five quantities discussed in this question: distance, displacement, time, speed, and velocity. Which of these are scalars and which are vectors?

A whale swims due east for a distance of 8.0 km in a time of 2.50 h. It then turns around and moves west for 2.0 km in a time of 0.50 h. It turns around again and heads 4.0 km due east in a time of 1.00 h. What is the total distance travelled by the whale. What is the total displacement? What is the average speed for the entire trip? What is the average velocity for the entire trip? There are five quantities discussed in this question: distance, displacement, time, speed, and velocity. Which of these are scalars and which are vectors?

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 28P: A cyclist rides 8.0 km east for 20 minutes, then he turns and heads west for 8 minutes and 3.2 km....

See similar textbooks

Similar questions

George walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed per second? What is his velocity in meters per second? I know the answer for the second one, velocity in meters per second is 38.46 m/s. But I'm really confused because since velocity = displacement/time. Displacement = final position - initial position. How can it equal 38.46 m/s since it should be 250 - 750 / t, not 750 - 250 / t? Please show the formula you use and explain it in an easy to understand way.
The nearest convenience store is 60 m, east from your house. You are walking 1.2 m/s for 15.0 s towards the store when it started raining so you have to ran back to your house to get an umbrella. It took you 5.0 s to go back to your house. You started walking again at 1.2 m/s until you reach the grocery. a. What is your average speed? b. Calculate the average velocity.
A vehicle drives at a constant speed of 215 km/h for 42.3 seconds, accelerates by 29.4m/s2 for 5.00s, and finally slows down to stop. The entire movement takes 88.6 seconds. B. Determine the maximum speed. C. Determine the total displacement. Two 9.82km separate trains travel on parallel tracks in opposite directions, one to the other. Train A has a speed of 5.87 km/h at departure and accelerates at a rate of 0.29m/s2. Train B has a speed of 20.3m/s at departure and an acceleration of 0.69m/s2. B. Determine when trains meet.
1. Leslie’s cat walks 4 meters east, 3 meters south, 2 meters west, and 9 meters north. What is the cat’s distance and displacement at the end of this walk? 2. Yesenia is driving her car north. In a period of 12.0 minutes, she covers a distance of 17.6 km. What is Yesenia’s average velocity in meters per second?
I am having trouble with an average speed problem. The problem states that a person walks at 4.5 meters per second from point a to b. Then walks back from point b to a at a speed of 3.2 m/s. I know that average speed is displacement/time. However I am not sure how to calculate time or displacement from the two givens. The problem also gives that the average velocity is 0.
You have already traveled 30 miles east and then 30 miles north. To get back to the start, you travel 30 miles west in 1 hour and then 30 miles south in a half hour. What are your average speed and average velocity for the whole rally? Explain your answer.
A rock is tossed straight up with a speed of 25 m/s. When it returns, it falls into a hole 11 m deep. 1) What is the rock's velocity as it hits the bottom of the hole? Express your answer in meters per second. Enter positive value if the velocity is upward and negative value if the velocity is downward. 2) How long is the rock in the air, from the instant it is released until it hits the bottom of the hole? Express your answer in seconds.
Q2. a) For the displacement equation, s = t2 +t-5, find the velocity and acceleration equations and plot each equation for the first 5 seconds. b) Compute your average velocity in the following two cases: (a) You walk 73.2 m at a speed of 1.22 m/s and then run 73.2 m at a speed of 3.05 m/s along a straight track. (b) You walk for 1.00 min at a speed of 1.22 m/s and then run for 1.00 min at 3.05 m/s along a straight track. (c) Graph x versus I for both cases and indicate how the average velocity is found on the graph.
A runner runs 1.29 km in 2.4 min and then takes 5.0 min to walk back to the starting point. What is the magnitude of the average velocity of the runner for the first 2.4 min? What is the magnitude of the runner's average velocity for the time spent walking? What is the magnitude of the average velocity for the total trip? What is the average speed for the total trip?
You are driving your car with a velocity of 60.0 km/h on a straight road. At t=0 s, you slow down your car to 30.0 km/h in 6.00 sec. You proceed with this constant velocity for 100. m and then speed up to 60.0 km/h at a rate of 2.80 m/s2. a) Draw a motion diagram for the whole trip and label it with known quantities b) Summarize all the known and unknown quantities for all three sections of this trip c) Calculate the total time elapsed until the car reaches the speed of 60 km/h Show all work step by step clearly and use correct formula. State the formula used.
Starting from a pillar, you run 400 m east (+x direction) at an average speed of 4 m/s, and then run 560 m north (+y direction) at an average speed of 7 m/s to a post. Calculate your average speed from pillar to post. a.) 82 m/s b.) 5.33 m/s c.) Not enough information.
A car is moving at a velocity of 20 m/s. The car then accelerates uniformly at 1.8 m/s2. The car continues at the same acceleration until it reaches a velocity of 25 m/s, which is the legal speed limit. What is the distance the car travels in while accelerating?