Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 1, Problem 17QAP
To determine
The motion of the car.
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You are driving 65.0 miles/hour and you see a police car, so you slow down to 42.5 miles/hour. It takes you 3 seconds to do this. What is your deceleration? (I asked this one before, but someone plugged in -22.5 miles/hr x 2.237 m/s / 1 mile an hour which I didn't understand)
A car drives east for two hours at 40 miles per hour. After stopping for two hours, it then drives east for another three hours at 60 miles per hour. Which of the following graphs correctly represents the distance versus time for this motion.
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Chapter 1 Solutions
Understanding Our Universe
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QAPCh. 1 - Prob. 2QAPCh. 1 - Prob. 3QAPCh. 1 - Prob. 4QAPCh. 1 - Prob. 5QAPCh. 1 - Prob. 6QAPCh. 1 - Prob. 7QAP
Ch. 1 - Prob. 8QAPCh. 1 - Prob. 9QAPCh. 1 - Prob. 10QAPCh. 1 - Prob. 11QAPCh. 1 - Prob. 12QAPCh. 1 - Prob. 13QAPCh. 1 - Prob. 14QAPCh. 1 - Prob. 15QAPCh. 1 - Prob. 16QAPCh. 1 - Prob. 17QAPCh. 1 - Prob. 18QAPCh. 1 - Prob. 19QAPCh. 1 - Prob. 20QAPCh. 1 - Prob. 21QAPCh. 1 - Prob. 22QAPCh. 1 - Prob. 23QAPCh. 1 - Prob. 24QAPCh. 1 - Prob. 25QAPCh. 1 - Prob. 26QAPCh. 1 - Prob. 27QAPCh. 1 - Prob. 28QAPCh. 1 - Prob. 29QAPCh. 1 - Prob. 30QAPCh. 1 - Prob. 31QAPCh. 1 - Prob. 32QAPCh. 1 - Prob. 34QAPCh. 1 - Prob. 35QAPCh. 1 - Prob. 36QAPCh. 1 - Prob. 37QAPCh. 1 - Prob. 38QAPCh. 1 - Prob. 39QAPCh. 1 - Prob. 40QAPCh. 1 - Prob. 41QAPCh. 1 - Prob. 42QAPCh. 1 - Prob. 43QAPCh. 1 - Prob. 44QAPCh. 1 - Prob. 45QAP
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- Your favorite car goes zero to 60 mph in 3.5 seconds. Assuming it accelerates uniformly, sketch a velocity versus time graph of the motion. Two significant figures, the car travels ___ miles in 3.5 seconds.arrow_forwardWhen running a half marathon (13.1 miles), it took Mark 8 minutes to run from mile marker 1 to mile marker 2, and 18 minutes to run from mile marker 2 to mile marker 4 What was Mark's average speed as he ran from mile marker 1 to mile marker 4?arrow_forwardQUESTION 2 You start out by driving 72 miles south in 3 hours and 13 minutes, and then you stop and park for a while. Finally you drive another 29 miles north in 2 hours and 5 minutes. The average velocity for your entire trip was 6.49 miles per hour to the south. How much time did you spend parked? 1 hours 19 minutes 2 hours 39 minutes 0 hours 39 minutes 6 hours 37 minutes QUESTION 3 A rocket-powered sled moves along a track, eventually reaching a top speed of 246 m/s to the east. It then begins to slow down, reaching a complete stop after slowing down for 2.10 s. What was the sled s average acceleration and velocity during the slowdown phase? 123 m/s^2 west, 123 m/s west 117.1 m/s^2 west, not enough information 0 m/s^2 0, 123 m/s east 117.1 m/s^2 east, not enough informationarrow_forward
- 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?arrow_forwardA burst water pipe in the city means you have to drive at a steady 12 km/h. Once past this obstacle, you speed up to 52 km/h in 10 s. You reach the freeway and, with the same acceleration, speed up for another 10 s to reach a higher speed. What is this final speed in km/h to one decimal place?arrow_forwardA car is traveling at 30 m/s ( approximately 67 mph) on I-95 highway. The driver applies the brakes and the car comes to a stop in 4.0 s . What is the car's acceleration, in m/s2? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed.arrow_forward
- Daryl and Cynthia leave home at 7 am, heading in opposite directions for work. Cynthia usually spends 20 minutes biking to work while Daryl needs only 30 minutes to walk to work. Cynthia's average speed is 3 miles per hour faster than Daryl's average speed. If they work 6 miles apart, what is the average speed, in miles per hour, for each person?arrow_forwardJulie drives 91 mi to Grandmother's house. On the way to Grandmother's house, Julie drives half the distance at 36 mph and half the distance at 56 mph. On her return trip, she drives half the time at 36 mph and half the time at 56 mph. What is Julie's average speed on the way to Grandmother's house?arrow_forwardy-axis. In velocity, speed-time graph is used by plotting time on the x-axis and speed on the y-axis. acceleration, velocity-time graph is used by plotting time on the x-axis and velocity on the y-axis. 1. The graph below shows the speed-time motion of a car for the first 40 seconds. 25 Speed (m/s) 20 15 10 10 20 36 40 time (s) a. Calculate the average velocity of the car during the first 10 seconds of the journey. b. Find the total distance traveled by the car in the first 40 seconds.arrow_forward
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