Concept explainers
The coefficient of static friction is 0.60 between the two blocks in FIGURE P7.35. The coefficient of kinetic friction between the lower block and the floor is 0.20. Force <m:math display='block'>
FIGURE P7.35
Learn your wayIncludes step-by-step video
Chapter 7 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics - Modified MasteringPhysics Access
Additional Science Textbook Solutions
Physics for Scientists and Engineers with Modern Physics
Conceptual Physics (12th Edition)
Physics (5th Edition)
University Physics Volume 1
Cosmic Perspective Fundamentals
Lecture- Tutorials for Introductory Astronomy
- Siobhan slides a 1.5 kg plate across the table towards you. a. What is the normal force acting on the plate? b.What is the kinetic friction force acting on the plate?The surfaces have ?k = 0.6 . c. Siobhan stops pushing when the plate is moving with speed ?i = 2.5 ?/?.How long will it take for the plate to come to a stop, and how far will it travel?arrow_forwardq11 A runner, Ricky ASHER, is travelling at 8.47 m/s. Turning into the final straight, they accelerate at a constant 1.0 m/s2. Their mass is 71 kg. Neglecting air resistance, what vertical force (in kN) does the track exert on them? Enter the numerical part of your answer, rounded to two significant figures.arrow_forwardA hockey puck (mass = 4 kg) leaves the players stick (moving to the left) with a speed of 20 m/s and slides on the ice before coming to rest.The coefficient of friction between the puck and the ice is 0.8. a) What is the normal force on the puck? N b) What is the friction force exerted on the puck due to the ice? N c) What is the magnitude of the acceleration of the puck due to this friction force? m/s2 d) How long will the puck slide after leaving the players stick? (what amount of time will it be sliding) s e) How far will the puck slide after leaving the players stick? marrow_forward
- A student’s backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an elevator. When the elevator is accelerating downward at 3.8 m/s2 , the scale reads 60 N. (a) What is the mass of the backpack? (b) What does the scale read if the elevator moves upward while speeding up at a rate 3.8 m/s2 ? (c) What does the scale read if the elevator moves upward at constant velocity? (d) If the elevator had no brakes and the cable supporting it were to break loose so that the elevator could fall freely, what would the spring scale read?arrow_forwardImagine a landing craft approaching the surface of Callisto, one of Jupiter’s moons. If the engine provides an upward force (thrust) of 3260 N, the craft descends at constant speed; if the engine provides only 2200 N, the craft accelerates downward at 0.39 m/s2. (a) What is the weight of the landing craft in the vicinity of Callisto’s surface? (b) What is the mass of the craft? (c) What is the magnitude of the free-fall acceleration near the surface of Callisto?arrow_forwarda 10 kg block is sitting on a flat friction less surface . earth gravity: (9.8 meters/second 2) moon gravity: (1.7 meters/second2) a) what is the mass of the block? b) what is the weight of the 10 kg block on the moon?arrow_forward
- 9. A block is pushed across a horizontal surface by the force shown. If the coefficient of kinetic friction between the block and the surface is 0.30, F = 20 N, and M = 3.0 kg, what is the magnitude of the block's acceleration? choose an answer A B C D E 2.8 m/s2 2.3 m/s2 1.8 m/s2 3.3 m/s2 5.4 m/s2arrow_forwardSomeone at the other end of the table asks you to pass the salt. Feeling quite dashing, you slide the 50.0-g salt shaker inthat direction, giving it an initial speed of 1.15 m>s. (a) If the shaker comes to rest with constant acceleration in 0.840 m,what is the coefficient of kinetic friction between the shaker and the table? (b) How much time is required for the shakerto come to rest if you slide it with an initial speed of 1.32 m>s?arrow_forwardA block with a mass of 3.00 kg starts from rest at the top of a 31.5° incline and slides 2.00 m down the incline in 1.45 s. (a) What is the magnitude of the acceleration of the block (in m/s2)? m/s2 (b) What is the frictional force (in N) acting on the block? (Enter the magnitude.) N (c) What is the coefficient of kinetic friction between the block and the incline? (d) What is the speed of the block (in m/s) after it has slid 2.00 m? m/sarrow_forward
- Three forces acting on an object are given by F1 = (−1.65î + 7.10ĵ) N, F2 = (4.60î − 2.1ĵ) N, and F3 = (−44î) N. The object experiences an acceleration of magnitude of 3.60 m/s2. (a) What is the direction of the acceleration? (b) What is the mass of the object? (c) If the object is initially at rest, what is its speed after 12.0 s? (d) What are the velocity components of the object after 12.0 s? (Let the velocity be denoted by v)arrow_forwardQ. What is the force on a 1000 kg elevator that is falling freely at 9.8 m/s2? The answer to this question is most likely answer cnhoices 9,800 N 9,800 m/s?2 9,800 kgarrow_forwardYour forehead can withstand a force of about 6.0 kN before fracturing, while your cheekbone can only withstand about 1.3 kN. a. If a 140 g baseball strikes your head at 30 m/s and stops in 0.0015 s, what is the magnitude of the ball’s acceleration? b. What is the magnitude of the force that stops the baseball? c. What force does the baseball apply to your head? Explain. d. Are you in danger of a fracture if the ball hits you in the forehead? In the cheek?arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON