PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
10th Edition
ISBN: 9781337888462
Author: SERWAY
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 8, Problem 45CP
Review. A uniform board of length L is sliding along a smooth, frictionless, horizontal plane as shown in Figure P8.45a. The board then slides across the boundary with a rough horizontal surface. The coefficient of kinetic friction between the board and the second surface is μk. (a) Find the acceleration of the board at the moment its front end has traveled a distance x beyond the boundary. (b) The board stops at the moment its back end reaches the boundary as shown in Figure P8.45b. Find the initial speed v of the board.
Figure P8.45
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
You are working with a team that is designing a new roller coaster-type amusement park ride for a major theme park. You are present for the testing of the ride, in which an empty 210 kg car is sent along the entire ride. Near the end of the ride, the car is at near rest at the top of a 103 m tall track. It then enters a final section, rolling down an undulating hill to ground level. The total length of track for this final section from the top to the ground is 250 m. For the first 230 m, a constant friction force of 350 N acts from computer-controlled brakes. For the last 20 m, which is horizontal at ground level, the computer increases the friction force to a value required for the speed to be reduced to zero just as the car arrives at the point on the track at which the passengers exit. (a) Determine the required constant friction force (in N) for the last 20 m for the empty test car. N (b) Find the highest speed (in m/s) reached by the car during the final section of track length…
You are working with a team that is designing a new roller coaster-type amusement park ride for a major theme park. You
are present for the testing of the ride, in which an empty 190 kg car is sent along the entire ride. Near the end of the ride,
the car is at near rest at the top of a 102 m tall track. It then enters a final section, rolling down an undulating hill to ground
level. The total length of track for this final section from the top to the ground is 250 m. For the first 230 m, a constant
friction force of 400 N acts from computer-controlled brakes. For the last 20 m, which is horizontal at ground level, the
computer increases the friction force to a value required for the speed to be reduced to zero just as the car arrives at the
point on the track at which the passengers exit.
(a) Determine the required constant friction force (in N) for the last 20 m for the empty test car.
4905.89
N
(b) Find the highest speed (in m/s) reached by the car during the final section of track…
A small block sits at one end of a flat board that is 4.00 m long. The coefficients of friction between the block and the board are μs= 0.450 and μ = 0.400. The end of the board where the block sits is slowly raised until the angle the board makes with the horizontal is α0, and then the block starts to slide down the board. If the angle is kept equal to α0 as the block slides, what is the speed of the block when it reaches the bottom of the board? Express your answer with the appropriate units.
Chapter 8 Solutions
PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
Ch. 8.1 - Consider a block sliding over a horizontal surface...Ch. 8.2 - A rock of mass m is dropped to the ground from a...Ch. 8.2 - Three identical balls are thrown from the top of a...Ch. 8.3 - You are traveling along a freeway at 65 mi/h. Your...Ch. 8 - Prob. 1PCh. 8 - A 20.0-kg cannonball is fired from a cannon with...Ch. 8 - A block of mass m = 5.00 kg is released from point...Ch. 8 - At 11:00 a.m, on September 7, 2001, more than one...Ch. 8 - A light, rigid rod is 77.0 cm long. Its top end is...Ch. 8 - Prob. 6P
Ch. 8 - A crate of mass 10.0 kg is pulled up a rough...Ch. 8 - A 40.0-kg box initially at rest is pushed 5.00 m...Ch. 8 - A smooth circular hoop with a radius of 0.500 m is...Ch. 8 - As shown in Figure P8.10, a green bead of mass 25...Ch. 8 - At time ti, the kinetic energy of a particle is...Ch. 8 - A 1.50-kg object is held 1.20 m above a relaxed...Ch. 8 - Prob. 13PCh. 8 - An 80.0-kg skydiver jumps out of a balloon at an...Ch. 8 - You have spent a long day skiing and are tired....Ch. 8 - The electric motor of a model train accelerates...Ch. 8 - An energy-efficient lightbulb, taking in 28.0 W of...Ch. 8 - An older-model car accelerates from 0 to speed v...Ch. 8 - Make an order-of-magnitude estimate of the power a...Ch. 8 - There is a 5K event coming up in your town. While...Ch. 8 - For saving energy, bicycling and walking are far...Ch. 8 - Energy is conventionally measured in Calories as...Ch. 8 - A block of mass m = 200 g is released from rest at...Ch. 8 - Make an order-of-magnitude estimate of your power...Ch. 8 - Prob. 25APCh. 8 - Review. As shown in Figure P8.26, a light string...Ch. 8 - Consider the blockspringsurface system in part (B)...Ch. 8 - Why is the following situation impossible? A...Ch. 8 - Jonathan is riding a bicycle and encounters a hill...Ch. 8 - Jonathan is riding a bicycle and encounters a hill...Ch. 8 - As the driver steps on the gas pedal, a car of...Ch. 8 - As it plows a parking lot, a snowplow pushes an...Ch. 8 - Heedless of danger, a child leaps onto a pile of...Ch. 8 - Review. Why is the following situation impossible?...Ch. 8 - A horizontal spring attached to a wall has a force...Ch. 8 - More than 2 300 years ago, the Greek teacher...Ch. 8 - Review. As a prank, someone has balanced a pumpkin...Ch. 8 - Review. Why is the following situation impossible?...Ch. 8 - An airplane of mass 1.50 104 kg is in level...Ch. 8 - A pendulum, comprising a light string of length L...Ch. 8 - A ball whirls around in a vertical circle at the...Ch. 8 - You are working in the distribution center of a...Ch. 8 - Prob. 43APCh. 8 - Starting from rest, a 64.0-kg person bungee jumps...Ch. 8 - Review. A uniform board of length L is sliding...Ch. 8 - A uniform chain of length 8.00 m initially lies...Ch. 8 - What If? Consider the roller coaster described in...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- To give a pet hamster exercise, some people put the hamster in a ventilated ball andallow it roam around the house(Fig. P13.66). When a hamsteris in such a ball, it can cross atypical room in a few minutes.Estimate the total kinetic energyin the ball-hamster system. FIGURE P13.66 Problems 66 and 67arrow_forwardA puck of mass 0.170 kg slides across ice in the positive x-direction with a kinetic friction coefficient between the ice and puck of 0.150. If the puck is moving at an initial speed of 12.0 m/s, (a) what is the force of kinetic friction? (b) What is the acceleration of the puck? (c) How long does it take for the puck to come to rest? (d) What distance does the puck travel during that time? (e) What total work does friction do on the puck? (f) What average power does friction generate in the puck during that time? (g) What instantaneous power does friction generate in the puck when the velocity is 6.00 m/s? (See Sections 2.5, 4.6, 5.1, and 5.6.)arrow_forwardA suspicious physics student watches a stunt performed at an ice show. In the stunt, a performer shoots an arrow into a bale of hay (Fig. P11.24). Another performer rides on the bale of hay like a cowboy. After the arrow enters the bale, the balearrow system slides roughly 5 m along the ice. Estimate the initial speed of the arrow. Is there a trick to this stunt? FIGURE P11.24arrow_forward
- Pregnancy dramatically affects the energetics of swimming for female dolphins. Dolphins have an approximately circular cross section and are very streamlined. A typical dolphin has a girth—the circumference at the widest part of the body—of 1.4 m and a drag coefficient of 0.090. Advanced pregnancy increases the girth to 1.7 m and, with a less streamlined shape, the drag coefficient to 0.22. Dolphins typically cruise at a speed of 3.4 m/s a.What will be the cruising speed of a pregnant dolphin if she swims with the same power output as before becoming pregnant?arrow_forwardProblem 3. James Bond is pursued by evil henchmen across a ski resort. He ends up at the top of a high jump runway, whose slope is 36deg. With nowhere else to go and without his trusty Walther PPK, he has no option but to go for it. He pushes himself off to an initial speed of V0=2 m/s and slides down the runway. The kinetic friction coefficient between his waxed wood skis and the snow is 0.10. The level of the takeoff point of this runway is H=50m below the level of the launch point. At the takeoff point, the runway is horizontal. Below that point, the runway reverts to a 36deg slope. Ignore air resistance. a) What is Bond’s speed with respect to the ground at the takeoff point in m/s and mph? How realistic is this estimate and why? b) What is the location of the landing point with respect to the takeoff point? How realistic is this estimate and why? c) WhatisBond’sspeedatlandinginm/sandmph?Howrealisticisthisestimateandwhy? d)…arrow_forwardYou are working with a team that is designing a new roller coaster–type amusement park ride for a major theme park. You are present for the testing of the ride, in which an empty 250-kg car is sent along the entire ride. Near the end of the ride, the car is at near rest at the top of a 110-m tall track. It then enters a final section, rolling down an undulating hill to ground level. The total length of track for this final section from the top to the ground is 250 m. For the first 230 m, a constant friction force of 50.0 N acts from computer-controlled brakes. For the last 20 m, which is horizontal at ground level, the computer increases the friction force to a value required for the speed to be reduced to zero just as the car arrives at the point on the track at which the passengers exit. (a) Determine the required constant friction force for the last 20 m for the empty test car. (b) Find the highest speed reached by the car during the final section of track length 250 m. (c) You are…arrow_forward
- A particle can slide along a track with elevated ends and a flat central part, as shown in the figure. The flat part has length L = 45.0 cm. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is μk = 0.2 . The particle is released from rest at point A, which is at height h = L/ 2 . How far from the left edge of the flat part does the particle finally stop?arrow_forwardA cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane as shown in figure. a)Determine the speed of the block after it has traveled 1.30 m along the plane, starting from rest. Assume there is no friction. b)Determine the speed of the block after it has traveled 1.30 m along the plane, starting from rest. Assume the coefficient of friction between all surfaces is μ = 0.0370. Since the block is much lighter than the cylinder, ignore tension in the string when calculating the normal force on the cylinder. Do not ignore tension in the string when calculating the net torque (including friction) on the cylinder.arrow_forwardA particle can slide along a track with elevated ends and a flat central part, as shown in the figure. The flat part has length L = 44.0 cm. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is μk = 0.2. The particle is released from rest at point A, which is at height h = L/2. How far from the left edge of the flat part does the particle finally stop? Number i Units Aarrow_forward
- 20. As shown in Figure A P8.20, a green bead of mass 25 g slides along a straight wire. The length of the wire from point @ to point ® is 0.600 m, and point A is 0.200 m higher than point . A constant friction force (B Figure P8.20 of magnitude 0.025 0 N acts on the bead. (a) If the bead is released from rest at point @, what is its speed at point ®? (b) A red bead of mass 25 g slides along a curved wire, subject to a friction force with the same constant magnitude as that on the green bead. If the green and red beads are released simultaneously from rest at point @, which bead reaches point 8 with a higher speed? Explain.arrow_forwardIn the figure below, the two blocks are released from rest, with the 2.0 kg block at height H above the ground. The coefficient of kinetic friction between the 3.0 kg block and the table on which it is moving is 0.11. What height H must be for the 2.0 kg block to have a speed of magnitude 9.1 m/s just before it hits the ground? Consider g = 10.0 m/s2. 15 m 2.5 m 6.2 m 8.7 m 31 m 25 m 12 m 19 marrow_forward5.0 kg particle can slide along a track with elevated ends and a flat central part, as shown in Figure. The flat part has length L = 12.0 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is Hx = 0.20. The particle is released from rest at point A, which is a height h = 2 m above the flat part of the track. Where does the particle finally stop? X=?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- 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 LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Mechanical work done (GCSE Physics); Author: Dr de Bruin's Classroom;https://www.youtube.com/watch?v=OapgRhYDMvw;License: Standard YouTube License, CC-BY