Concept explainers
Figure 5.39 shows an apparatus used to verify Newton’s second law. A “pulling mass” m1 hangs vertically from a string of negligible mass that passes over a pulley, also of negligible mass and with nearly frictionless bearings. The other end of the string is attached to a glider of mass m2 riding on an essentially frictionless, horizontal air track. Both m1 and m2 may be varied by placing additional masses on the pulling mass and glider. The experiment consists of starting the glider from rest and letting the pulling mass accelerate it down the track. Three photogates are used to time the glider over two distance intervals, and an experimental value for its acceleration is determined from these data, using constant-acceleration equations from Chapter 2. The table in the next column lists the measured acceleration for a number of mass combinations, (a) Determine a quantity that, when plotted on the horizontal axis of a graph, should result in a straight line of slope g when acceleration is plotted on the vertical axis, (b) Make your plot, fit a line to the plotted data, and report the experimentally determined value of g.
FIGURE 5.39 Problem 76
m1 (g) | m2 (g) | a (m/s2) |
10.0 | 170 | 0.521 |
10.0 | 270 | 0.376 |
10.0 | 370 | 0.274 |
20.0 | 170 | 1.06 |
20.0 | 270 | 0.652 |
20.0 | 370 | 0.534 |
Want to see the full answer?
Check out a sample textbook solutionChapter 5 Solutions
Essential University Physics
Additional Science Textbook Solutions
Conceptual Integrated Science
Sears And Zemansky's University Physics With Modern Physics
Modern Physics
The Cosmic Perspective Fundamentals (2nd Edition)
The Cosmic Perspective
Physics (5th Edition)
- A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s2. Consider the system is the box and the Earth. Which of the following is considered the external force? Select all apply.arrow_forwardA desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties m, a rope to a rock of mass m, = 3.90 x 10? kg and makes his way over the ledge (see the figure). If the coefficient of static friction between the rock and the ground is µs = 0.283, and the mass of the hiker is m, = 70.1 kg, what is the maximum mass of the friend m; that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. kg IIarrow_forwardA block of mass m2 on a rough, horizontal surface is connected to a ball of mass m1 by a lightweight cord over a lightweight, frictionless pulley as shown in 5.21a. A force of magnitude F at an angle θ with the horizontal is applied to the block as shown, and the block slides to the right. The coefficient ofkinetic friction between the block and surface is μk. Determine the magnitude of the acceleration of the two objects.arrow_forward
- A 10.0 kg mass hangs from a rope, as shown in the figure. The rope passes over a fixed pulley, then under a movable pulley, and is attached to the ceiling as shown. The movable pulley has a mass m attached to it and moves at a constant speed. Find the tension in the rope. Assume that the masses of the pulleys are negligible.arrow_forwardFor the next three items: A 200 kg plank is projecting a distance L = 5.0 m from a wall which is held steadily by a string that is connected to it at an angle = 30° from the horizontal. The plank is actually fasted to the wall where an unknown force F is exerted on the plank by the wall. If a 60 kg mass is placed on the plank at a distance d = 1.0 m, find the tension force on the string. Ө d O 1300 N O 4200 N O 1600 N O2200 N L-arrow_forwardYou find it takes 190 N of horizontal force to move an unloaded pickup truck along a level road at a speed of 2.4 m/s . You then load up the pickup and pump up its tires so that its total weight increases by 42%while the coefficient of rolling friction decreases by 19%. Now what horizontal force will you need to move the pickup along the same road at the same speed? The speed is low enough that you can ignore air resistance..arrow_forward
- A block of mass m resting on a 20° slope. The block has coefficients of friction us = 0.80 and μk = 0.50 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. (a) What is the minimum mass m that will stick and not slip? (b) If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have? m 20° 2.0 kgarrow_forwardA box is at rest on a floor. The box has a mass of 35.0 kg. A force P = 213.0 N is acting to the left at an angle = 31.5° above the horizontal as shown in the figure provided on the right. Between the box and the floor, the coefficient of static friction is Hs = 0.830 and the coefficient of kinetic friction is HK = 0.778. What is the magnitude of the normal force acting on the box? P 0 marrow_forwardA mug of root beer is sliding across a horizontal table with a constant velocity of 5.0[m/s], and is experiencing a friction force. If the mug has a total mass of 2.60[kg] and μk = 0.250, find the force due to friction. Express your answer in N.arrow_forward
- A mule is harnessed to a sled having a mass of 201 kg, including supplies. The mule must exert a force exceeding 1270 N at an angle of 30.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point as a particle. a) Calculate the normal force (in N) on the sled when the magnitude of the applied force is 1270 N. (Enter the magnitude.) N (b) Find the coefficient of static friction between the sled and the ground beneath it. (c) Find the static friction force (in N) when the mule is exerting a force of 6.35 ✕ 102 N on the sled at the same angle. (Enter the magnitude.) Narrow_forwardKarev is lowering two boxes, one on top of the other, down the ramp, as shown in the figure, by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 15 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.444, and the coefficient of static friction between the two boxes is 0.800. (b) What are the magnitude of the friction force on the upper box?arrow_forwarda fastidious worker pushes directly along the handle of a mop with a force . The handle is at an angle u with the vertical, and ms and mk are the coefficients of static and kinetic friction between the head of the mop and the floor. Ignore the mass of the handle and assume that all the mop’s mass m is in its head. (a) If the mop head moves along the floor with a constant velocity, then what is F? (b) Show that if u is less than a certain value u0, then (still directed along the handle) is unable to move the mop head. Find u0arrow_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