er are tional DA The fields Owing of the con- At this 500 m pulse. erage ravels pos- posi city in t direc- swers ground

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Er Are Tional Da The Fields Owing Of The Con At This 500 M Pulse Erage Ravels Pos Posi City In T Direc Swers Ground 1 (53.82 KiB) Viewed 35 times

er are tional DA The fields Owing of the con- At this 500 m pulse. erage ravels pos- posi city in t direc- swers ground Problems 49 WileyPLUS 7. The three-toed sloth is the slowest-moving land mammal. On the ground, the sloth moves at an average speed of 0.037 m/s, considerably slower than the giant tortoise, which walks at 0.076 m/s. After 12 minutes of walking, how much further would the tortoise have gone relative to the sloth? 8. GO An 18-year-old runner can complete a 10.0-km course with an av erage speed of 4.39 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.27 m/s. How much later (in seconds) should the younger runner start in order to finish the course at the same time as the older 9. A tourist being chased by an angry bear is running in a straight time toward his car at a speed of 4.0 m/s. The car is a distance d away. The bear is 26 m behind the tourist and running at 6.0 m/s. The tourist reaches the car safely. What is the maximum possible value for d? TO: C-Nu in reaching her destination backpackes walk with erage velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west, turns around, and hikes with an average velocity of 0.447 m/s, due cast. How far cast did she walk? 11. MSSM A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 7.2 m/s. During the second part, she rides for 36 minutes at an average speed of 5.1 m/s. Finally, during the third part, she rides for 8.0 minutes at an average speed of 13 m/s. (a) How far has the bicyclist traveled during the entire trip? (b) What is her average velocity for the trip? 12. V-MINT A car makes a trip due north for three-fourths of the time and due south one-fourth of the time. The average northward velocity has a magnitude of 27 m/s, and the average southward velocity has a mag- nitude of 17 m/s. What is the average velocity (magnitude and direction) for the entire trip? 13. You are on a train that is traveling at 3.0 m/s along a level straight track. Very near and parallel to the track is a wall that slopes upward at a 12° angle with the horizontal. As you face the window (0.90 m high, 2.0 m wide) in your compartment, the train is moving to the left, as the drawing indicates. The top edge of the wall first appears at window corner A and eventually disappears at window corner B. How much time passes between appearance and disappearance of the upper edge of the wall? PROBLEM 13 3.0 m/s 12⁰ Section 2.3 Acceleration 14. Review Conceptual Example 6 as background for this problem. A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 27.0 m/s. and during a 5.0-s interval, it changes to a final speed of (a) 29.0 m/s and (h) 230 m/s. In each case find the acceleration (magnitude and algebraic