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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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
Transcribed Image Text:Problem 4: In a biathalon race you first ride a bicycle at an average speed of 19.8 mi/h for 19 miles, then you must run for another
3.5 miles.
With what average speed, in miles per hour, must you run if your average speed for the entire race is to be 14.2 mi/h?
Numeric : A numeric value is expected and not an expression.
V2,ave =
이
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- A car starts from 2.00 m/s and accelerates at 4.00 m/s2 for 6.0 s, it coasts for 5.00 s, and then slows down at a rate of 2.00 m/s2to a stop. How far has it traveled, in meters? Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.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_forwardThe speed limit for highway is typically 70 mph in MD. What is 70 mph in terms of m/s? 1.000 mile = 1609 marrow_forward
- 1. A pilot flies in a straight path for 1 h 30 min. She then makes a course correction, heading 10 degrees to the right of her original course, and flies 2 h in the new direction. If she maintains a constant speed of 610 mi/h, how far is she from her starting position?Your answer is mi;Enter your answer rounded to two decimal places. 2. A steep mountain is inclined 74 degree to the horizontal and rises to a height of 3400 ft above the surrounding plain. A cable car is to be installed running to the top of the mountain from a point 880 ft out in the plain from the base of the mountain. Find the shortest length of cable needed.Your answer is ftarrow_forwardv(m/s) The opposite figure shows the relationship between speed and 3 time. an object is in motion, the distance traveled by the object t(s) during (6s) in meters is equal to: 3 6arrow_forwardQ11. Polar bears are strong swimmers and can swim as long as 10 hours without rest. If a polar bear swims with an average speed of 2.6 m/s, what is the total distance it can swim in 10.0 hours? Give your answer in km.arrow_forward
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