Concept explainers
* Loop-the-loop You have to design a loop-the-loop for a new amusement park so that when each car passes the top of the loop inverted (upside-down), each seat exerts a force against a passenger's bottom that has a magnitude equal to 15 times the gravitational force that Earth exerts on the passenger. Choose some reasonable physical quantities so these conditions are met. Show that the loop-the-loop will work equally well for passengers of any mass.
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Chapter 5 Solutions
College Physics: Explore And Apply, Volume 2 (2nd Edition)
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Physics for Scientists and Engineers with Modern Physics
The Cosmic Perspective (8th Edition)
University Physics Volume 1
College Physics (10th Edition)
An Introduction to Thermal Physics
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
- Unreasonable Results A mother pushes her child on a swing so that his speed is 9.00 m/s at the lowest point of his path. The swing is suspended 2.00 m above the child's center of mass. (a) What is the magnitude of the centripetal acceleration of the child at the low point? (b) What is the magnitude of the force the child exerts on the seat if his mass is 18.0 kg? (c) What is unreasonable about these results? (d) Which premises are unreasonable or inconsistent?arrow_forwardA roller-coaster vehicle has a mass of 509 kg when fully loaded with passengers (see figure). 15 m 10 m (a) If the vehicle has a speed of 20.0 m/s at point A, what is the force of the track on the vehicle at this point? N (b) What is the maximum speed the vehicle can have at point B in order for gravity to hold it on the track? m/sarrow_forward* Question Completion Status: A Moving to another question will save this response. Question 6 An 17.83kg box is released on a 28° incline and accelerates down the incline at 0.53 m/s4. How large is the coefficient of kinetic friction? A Moving to another question will save this response.arrow_forward
- An object is dropped from an altitude of one earth radius above the earth’s surface. Neglect air resistance. Let M = the mass of the earth and R = the radius of the earth. The speed of the object just before it hits the earth, in terms of G, M, and R is __________ *Draw a diagram to show the initial and final positions of this object with respect to the surface of Earth. Then use Conservation of Mechanical Energy.arrow_forward*Problem 4: A wooden box (20 kg) is released from rest on a 0 attached to a string which runs up the incline, over a pulley, and is attached to a hanging mass. 25° concrete incline (us = 0.75 µk 0.45). The box is a) What is the maximum hanging mass before the wooden box starts to move up the incline? (Answer: 22 kg) b) If the hanging mass were changed to 25 kg and released, what would be the acceleration of the wooden box? (Answer: 1.83 )arrow_forwardOne great form of athletic competition for bulldogs, American pit bull terriers, huskies, and many other breeds is the weight pull. Many of these dogs can pull weights two orders of magnitude greater than their own weight! Railsplitter, an American pit bull terrier, can pull a sled that has a total weight of 2215 lb along a horizontal surface. Suppose he pulls with a horizontal force of 3.50 103 N while friction is also working against the sled. If the magnitude of the net acceleration of the sled is 0.152 m/s2, find the value of the coefficient of kinetic friction, k, between the sled and the pulling surface. (The sled is normally on a set of rails.)arrow_forward
- Why is the following situation impossible? A softball pitcher has a strange technique: she begins with her hand at rest at the highest point she can reach and then quickly rotates her arm backward so that the ball moves through a half-circle path. She releases the ball when her hand reaches the bottom of the path. The pitcher maintains a component of force on the 0.180-kg ball of constant magnitude 12.0 N in the direction of motion around the complete path. As the ball arrives at the bottom of the path, it leaves her hand with a speed of 25.0 m/s.arrow_forward* for ce of friction is I57 N A 32 kg block sits on a table. This block is attached by a string to a second block that hangs. The string runs over a pulley, as shown below. What is the maximum mass of the hanging block that will allow the 32 kg block to remain stationary? 10. 32Kgarrow_forwardA box is projected upward onto a ramp that has a 15 degree incline. I know knows that it starts with an initial velocity of 8 m / s. The coefficient of kinetic friction between the box and the ramp is 0.12. Determine the following: a. The distance the box will travel on the ramp. b. The speed of the box when it returns to its original position.arrow_forward
- A 59.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3.00 m. (Figure 1) Figure Part A What speed does he need at the bottom? Express your answer with the appropriate units. v0 = Submit 0 μĂ Value Provide Feedback Request Answer Units ?arrow_forwardD A 100-kg pilot takes his airplane into a 1.5-km vertical loop at a speed of 300 m/s at the bottom of the loop. If his speed remains constant, determine: a) The force of the seat onto the pilot at the top of the loop b) The force of the seat onto the pilot at the bottom of the loop c) The required speed of the plane at the top of the loop if the pilot were to appear weightlessarrow_forward30 ft _6 ft- 5 ft B ft The boy pulls on the rope with a force of 80 lb.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
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