Concept explainers
Problems 39 through 45 are motion problems similar to those you will learn to solve in Chapter 2. For now, simply interpret the problem by drawing a motion diagram showing the object's position and its velocity vectors. Do not solve these problems or do any mathematics.
45. A motorist is traveling at 20 m/s. He is 60 m from a stop light when he sees it turn yellow. His reaction time, before stepping on the brake, is 0.50 s. What steady deceleration while braking will bring him to a stop right at the light?
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
COLLEGE PHYSICS:STRATEGIC APPR.AP ED.
Additional Science Textbook Solutions
Biology: Life on Earth (11th Edition)
Applications and Investigations in Earth Science (9th Edition)
Cosmic Perspective Fundamentals
Organic Chemistry (8th Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Microbiology with Diseases by Body System (5th Edition)
- A disoriented physics professor drives 3.25 km north, then 4.75 km west, and then 1.50 km south. A. Use components to find the magnitude and direction of the resultant displacement of this professor. B. Check the reasonableness of your answer with a graphical sum.arrow_forwardClean handwritingarrow_forwardAnswer the entire problem set by using kinematic equations. Your answers must be rounded off to two decimal places. If the numerical answer exceeds 1000, do not use a comma as for 1,000. Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 333 m/s in 1.11 seconds, then what is the acceleration, and what is the distance that the sled travels?arrow_forward
- Pls help ASAP. Pls show all work and calculations.arrow_forwarda. You leave your home & drive 45 km in the +y direction for a job interview. They offer you the job so you decide to stop and celebrate with friends on the way home. You leave the interview and drive 22 km in the -y direction. Let your home be your reference point. - What total distance did you drive?(km) - What total distance did you drive? ____km to the a. +y, b. -y, c. +x, d. -x, c. no direction b. You are standing on a circular track that is 400 m long. You begin jogging at the start line and keep jogging until you complete 2 full lap and stop at the same point you started at. - What is the total distance you travel? (m) -What is your final displacement? (m)arrow_forwardProblem-Solving Technique: Draw a labeled picture. Put a coordinate system on the picture indicating the location of the origin and the positive direction. Show the solution in a step-by-step orderly fashion. Write any equation you use in symbolic form before substituting in numbers. 1. Ann is traveling at 30 m/s (80 mi/hr) west when she passes a police car. She immediately begins slowing down at a rate of 2.5 m/s for 4 seconds. How far has she traveled for this time? a. Fill in the information that is given in the problem. Put a question mark for any quantity that is not given in the problem. Vox = v. = b. Determine the distance she traveled in this time. Start with the equation in sy numbers you used including units. olic form and show thearrow_forward
- Let's Appraise A trekker walks 5.0 km North [N] and then 8.0 km South [S] for 3.0 hours. Determine the trekker's: 1. Average velocity a. b. Average speed A car's velocity is at 100 km/h going North [N}for 1.0 hour. The car continues to move for another 2.0 hours at 82 km/h South [S]. Determine the car's: 2. Total displacement a. b. Moving average velocity C. Total distance covered d. Moving average speed f dictance and time.arrow_forwardPlease answer number 2 with an explanation. Thank youarrow_forwardAnswer the entire problem set by using kinematic equations. Your answers must be rounded off to two decimal places. If the numerical answer exceeds 1000, do not use a comma as for 1,000. An airplane accelerates down a runway at 4.50 m/s2 for 45.6 s until it finally lifts off the ground. Determine the distance traveled before takeoff.arrow_forward
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College