![University Physics with Modern Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780321973610/9780321973610_largeCoverImage.gif)
Concept explainers
CP A small block with mass 0.0400 kg slides in a vertical circle of radius R = 0.500 m on the inside of a circular track. During one of the revolutions of the block, when the block is at the bottom of its path, point A. the normal force exerted on the block by the track has magnitude 3.95 N. In this same revolution, when the block reaches the top of its path, point R. the normal force exerted on the block has magnitude 0.680 N. How much work is done on the block by friction during the motion of the block from point A to point B?
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 7 Solutions
University Physics with Modern Physics (14th Edition)
Additional Science Textbook Solutions
Conceptual Physics (12th Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Physics for Scientists and Engineers with Modern Physics
University Physics Volume 1
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
- Instead of moving back and forth, a conical pendulum moves in a circle at constant speed as its string traces out a cone (Fig. P6.68). One such pendulum is constructed with a string of length L = 12.0cm and bob of mass 0.210 kg. The string makes an angle = 7.00 with the vertical, a. What is the radial acceleration of the bob? b. What are the horizontal and vertical components of the tension force exerted by the string on the bob?arrow_forwardA small disk of mass m is attached by a rope to a block with a larger mass M through a hole in a table as shown in Figure P6.53. The disk moves in circle of radius R at constant speed, and the block is at rest. Assume friction between the disk and the table is negligible. Find an expression for its speed vucm in terms of the parameters given and the tension FT in the rope. FIGURE P6.53 Problems 53 and 54.arrow_forwardStarting from rest, a rectangular toy block with mass 300 g slides in 1.30 s all the way across a table 1.20 m in length that Zak has tilted at an angle of 42.0 to the horizontal. a. What is the magnitude of the acceleration of the toy block? b. What is the coefficient of kinetic friction between the block and the table? c. What are the magnitude and direction of the friction force acting on the block? d. What is the speed of the block when it is at the end of the table, having slid a distance of 1.20 m?arrow_forward
- A 0.275-kg object is swung in a vertical circular path on a string 0.850 m long as in Figure P7.70. (a) What are the forces acting on the ball at any point along this path? (b) Draw free-body diagrams for the ball when it is at the bottom of the circle and when it is at the top. (c) If its speed is 5.20 m/s at the top of the circle, what is the tension in the string there? (d) If the string breaks when its tension exceeds 22.5 N, what is the maximum speed the object can have at the bottom before the string breaks? Figure P7.70arrow_forwardA car is moving in a circular road ( radius of 55.4 m) with a speed of 10.8 m/s. Find the minimum static friction coefficient between the wheels of the car and the road to keep the car moving without sliding. Select one: OA. 0.320 OB. 0.253 OC. 0.278 OD. 0.305 OE 0.215 Next pagearrow_forwardCircular turns of radius r in a race track are often banked at an angle θ to allow the cars to achieve higher speeds around the turns. Assume friction is not present, and use the coordinate system specified. a.Find the y component of the normal force FN on a car going around the turn in terms of the angle θ and the magnitude of the normal vector FN. b. Find the x component of the normal force FN on a car going around the turn in terms of the angle θ and the magnitude of the normal vector FN. c. Now write the magnitude of the normal force in terms of the force of gravity Fg and the angle θ. d. Now write the magnitude of the normal force again, this time in terms of the gravitational force Fg, g, θ, the radius of the track r, and the velocity that the car is traveling v. e.Now assume that the car is moving at 15 m/s and the radius of the track is 130 m. What is the angle θ in degrees?arrow_forward
- A jet airplane is in level flight. The mass of the airplane is m = 8850 kg. The airplane travels at a constant speed around a circular path of radius R = 9.55 mi and makes one revolution every T = 0.126 h. Given that the lift force acts perpendicularly upward from the plane defined by the wings, what is the magnitude of the lift force acting on the airplane? R L = kNarrow_forward10. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 10.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.70, and the angle 0 in the drawing is 23.0°. Find the speed of your suitcase. m/s 160 ssf60 ssf60 ssr60 ssf60 ssi60 ssf60 ssf60 ssf60 ssf60 ssf60 ssf60 ss sf60 ssf60 ssf60 o sstoarrow_forwarda car is driven at constant speed over a circular hill and then into a circular valley with the same radius. At the top of the hill, the normal force on the driver from the car seat is 0. The driver’s mass is 70.0 kg.What is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley?arrow_forward
- You are sitting on the edge of a horizontal disk (for example, a playground merry-go-round) that has radius 3.00 mm and is rotating at a constant rate about a vertical axis. The coefficient of static friction between you and the surface of the disk is 0.430. a) What is the minimum time for one revolution of the disk if you are not to slide off? b) Your friend's weight is half yours. If the coefficient of static friction for him is the same as for you, what is the minimum time for one revolution if he is not to slide off?arrow_forwardA car is moving in a circular road ( radius of 51.4 m) with a speed of 16.1 m/s. Find the minimum static friction coefficient between the wheels of the car and the road to keep the car moving without sliding. Select one: O A. 0.606 B. 0.666 C. 0.515 O D. 0.767 O E. 0.731arrow_forwardCurrent Attempt in Progress The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle ((r= 11.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.520, and the angle in the drawing is 7.45°. How much time is required for your suitcase to go around once? Assumme that the static friction between the suitcase and the carousel is at its maximum. Number Unitsarrow_forward
- Physics 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 LearningCollege PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553292/9781337553292_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781133939146/9781133939146_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781285737027/9781285737027_smallCoverImage.gif)