Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 2, Problem 53P
To determine
The average speed during the relay and compare it with individual speed.
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A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then returns to its starting point. This trip takes 0.75 hr. a) What was the bear's average speed? b) What was the bear's average velocity?
Tired, you walk from your house to a local coffee shop to get an espresso. You average a speed of 2.4 m/s on your way there. After your espresso, you decide to run directly back to your starting point with an average speed of 5.6 m/s. Assume you spend 4 minutes at the coffee shop. If your average speed for this entire trip is 1.9 m/s, what is the distance between your house and the coffee shop?
Ms. Gordon drives to the store to get some milk. She travels at a constant speed of 30.0 mph on her way to the store. While at the store it starts snowing and the roads become treacherous. On the way back she travels at a constant speed of 20.0 mph. She takes the same exact route in each direction. What is her average speed for the entire trip? Don’t count the time that she was in the store. (Hint: the answer is NOT 25.0 mph)
Chapter 2 Solutions
Physics for Scientists and Engineers
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- A standard Olympic running track is an oval that measures 400 m in circumference (the length all the way around). If you jog 4 complete laps, starting and stopping at the same line, what is the distance you travel? What is your total displacement? Explain your reasoning for each answer.arrow_forwardTo burn the fats she accumulated during the lockdown, Katie walks south at a speed of 2.00 m/s for 60.0 minutes. She then turns around and walks north a distance 3000 m in 25.0 minutes. What is her total distance covered?arrow_forwardA polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then 1.0 km north to return to its starting point. This trip takes 45 min. What was the bear's average speed and velocity?arrow_forward
- In an experiment, a shearwater (a seabird) was taken from its nest, flown a distance 5120 km away, and released. It found its way back to its nest 12.5 days after release. Part A If we place the origin in the nest and extend the +x-axis to the release point, what was the bird's average velocity for the return flight? Express your answer in meters per second. ANSWER: Vay.-x = m/s Part B What was the bird's average velocity for the whole episode, from leaving the nest to returning? Express your answer in meters per second. ANSWER: Vav. = m/sarrow_forwardYou are driving home from school steadily at 99 km/h for 190 km . It then begins to rain and you slow to 63 km/h instantly. You arrive home after driving 5.0 hours. How far is your hometown from school?Express your answer using two significant figures. What was your average speed?Express your answer using two significant figures.arrow_forwardHow do I solve part b?arrow_forward
- You are driving home from school steadily at 97 km/hkm/h for 160 kmkm . It then begins to rain and you slow to 61 km/hkm/h instantly. You arrive home after driving 4.5 hours. How far is your hometown from school? answer using two significant figures. What was your average speed? answer using two significant figures.arrow_forwardCe A webassign.net/web/Student/Assignment-Responses/submit?dep=27519463&tags=autosave#question3572106_11 (h) 0.0207 3 DETAILS A walker covers a distance of 2.2 km in a time of 32 minutes. What is the average speed of the walker for this distance in km/h? km/h 5. DETAILS A tortoise and a hare cover the same distance in a race. The hare goes very fast for brief intervals, but stops frequently, whereas the t hare. (a) Which of the two racers has the greater average speed over the duration of the race? OThe tortoise has the greater average speed since he was the winner. The hare has the greater average speed since he can go faster. Their average speeds are equal. OIt's impossible to determine who had the greater average speed without collecting data. (b) Which of the two racers is likely to reach the greatest instantaneous speed during the race? OThe tortoise has the greater instantaneous speed since he was the winner. OThe hare has the greater instantaneous speed since he can go faster.arrow_forwardA frog fell down an abandoned Well which was 15 meters deep. He found it difficult to jump up the coated walls. He started his long jump up the Well at 6am. It took him him 15 minutes to jump three meters because the walls were so slippery. At the end of every 15 minute period he rested for 5 minutes while he sadly slipped down one meter. He continued on at the same rate. At what time did he finally reach the top of the Well? Draw a diagram to show your workarrow_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_forwardShown below is a graph of velocity versus time for a moving object. The object starts at position x = 0 m at t = 0 s. What is the final position in meters, from t = 0s to t = 2.0 s? Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. (No unit is needed in your answer, it is already given in the question statement.) A 1 3 time in seconds velocity in meters/second +10 -10 Iarrow_forwardSOLVE STEP BY STEP IN DIGITAL FORMAT 14. If the speed in (m/s) that a certain athlete reaches in a 200-meter race is described by the function v(x) =-0.005x(x - 300), where x is the recommended distance. a) What distance has the athlete traveled when he reaches his maximum speed?b) What is the maximum speed he reaches?arrow_forward
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