Concept explainers
Ski jumping in Vancouver The 2010 Olympic ski jumping competition was held at Whistler Mountain near Vancouver. During a jump, a skier starts near the top of the in-run, the part down which the skier glides at increasing speed before the jump. The Whistler in-run is 116 m long and for the first part is tilted down at about
Using the same assumptions as stated in Problem 4.102 which answer below is closest to the jumper's speed when leaving the in-run?
a. 37 m/s
b. 31 m/s
c. 27 m/s
d. 24 m/s
e. 21 m/s
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
College Physics
Additional Science Textbook Solutions
Sears And Zemansky's University Physics With Modern Physics
University Physics (14th Edition)
Life in the Universe (4th Edition)
University Physics Volume 1
The Cosmic Perspective (8th Edition)
Conceptual Physical Science (6th Edition)
- A ball is thrown from a high window. The arc path that it takes is a result of the combination of its horizontal and vertical motions. Which statement describes the acceleration of the ball? O The ball accelerates horizontally away from the building. The ball accelerates upward away from the ground. The ball does not accelerate. The ball accelerates vertically downward toward the ground.arrow_forwardThe magnitude of vector A is 8 km, and the magnitude of B is 6 km. Which of the following are possible values for the magnitude of A + B? Choose all possible answers. (a) 10 km (b) 8 km (c) 2 km (d) 0 (e) 2 kmarrow_forwardSuppose at one point along the Nile River a ferryboat must travel straight across a 10.3-mile stretch from west to east. At this location, the river flows from south to north with a speed of 2.41 m /s. The ferryboat has a motor that can move the boat forward at a constant speed of 20.0 mph in still water. In what direction should the ferry captain direct the boat so as to travel directly across the river?arrow_forward
- Use the component method to add the vectors A and B shown in Figure P3.9. Both vectors have magnitudes of 3.00 m and vector A makes an angle of = 30.0 with the x axis. Express the resultant A+B in unit-vector notation.arrow_forwardThe rectangle shown in Figure P3.56 has sides parallel to the x and y axes. The position vectors of two corners are = 10.0 m at 50.0 and = 12.0 m at 30.0. (a) Find the perimeter of the rectangle. (b) Find the magnitude and direction of the vector from the origin to the upper-right corner of the rectangle.arrow_forwardIn an assembly operation illustrated in Figure P3.30. a robot moves an object first straight upward and then also to the east, around an arc forming one-quarter of a circle of radius 4.80 cm that lies in an eastwest vertical plane. The robot then moves the object upward and to the north, through one-quarter of a circle of radius 3.70 cm that lies in a northsouth vertical plane. Find (a) the magnitude of the total displacement of the object and (b) the angle the total displacement makes with the vertical. Figure P3.30arrow_forward
- Trent is running along a circular track that has a radius of 45 meters. Trent starts at the 3-o'clock position and travels in the CCW direction, stopping after 106 meters. Imagine an angle with a vertex at the center of the circular track that subtends the path Trent has traveled. When Trent stops, what is his vertical distance from the center of the track?arrow_forward1. My friend ask help from me to pull on a heavy box, but he pulls twice as hard as me. He is pulling with a direction of 65.0° North of West, and the resultant of both our pulls is 460.0 N due North. Use vector components and triangle method to find the magnitude of each of our pulls and the direction of the smaller pull. 2. A kalesa and a bicycle start with zero initial velocity at the same instant, with the kalesa initially at some distance behind the bicycle. The kalesa has a 2.1 m/s^2 constant acceleration and 3.4 m/s^2 acceleration for bicycle. The kalesa overtakes the bicycle after the bicycle has moved 40.0 m. (a) How long does it take the kalesa to overtake the bicycle? (b) What was the distance of the kalesa behind the bicycle initially? (c) What is the speed of each when they are side by side? 3. A 15-kg rock is dropped from rest on the earth and reaches the ground in 1.75 s. When it is dropped from the same height on Saturn's satellite Enceladus, it reaches the ground in…arrow_forwardAt the beginning of a 3.0-h plane trip, you are traveling due north at 192 km/h. At the end, you are traveling 239 km/h in the northwest direction (45° west of north). a. Which of the following are the initial and final velocity vectors? SEE ATTACHMENTS b. Find the magnitude of the change in velocity. anser in km/h c. Find the change in direction of your velocity. Enter the angle in degrees where negative indicates north of west and positive indicates south of west. answer in degrees d. What is the magnitude of your average acceleration during the trip? answer in km/h^2arrow_forward
- A solid metal ball is thrown from the top of a building at an angle of 20° above the horizontal with an initial speed of 12 m/s. The ball lands on the ground 2.5 s after it is thrown. What is the height of the building (in m)? m Need Help? Submit Answer Read Itarrow_forwardAn airplane is flying with a constant altitude at a speed of 475 mph in a direction 20° north of west directly towards its final destination. The airplane then encounters wind blowing at a steady 34 mph in a direction 85° north of east. a. Start by drawing a vector diagram for this situation. Did you draw a diagram? ? b. If the pilot does not correct his course after encountering the wind, at what speed and in what direction (counterclockwise from east) will the plane be traveling? i. Speed: mph Preview ii. Direction: Preview c. If the airplane had encountered no wind at all, it would have reached its final destination in two hours along its original course. Assuming the pilot never corrected his course and that the wind continues to blow at the given speed and direction, how far from its final destination is the airplane after two hours of flying under the given conditions? miles Previewarrow_forwardA. Draw each of the following vectors to scale. Indicate the scale that you have used. Use graphing paper, pencil, pen, ruler and protractor. 1. 12 km south 2. 1.5 m N 450 W 3. 1 m/s 200 E of N 4. 50 km/h 5. 5 mmarrow_forward
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning