As in problem 80, an 87-kg man plans to tow a 111000-kg airplane along a runway by pulling horizontally on a cable attached to it. Suppose that he instead attempts the feat by pulling the cable at an angle of 6.4° above the horizontal. The coefficient of static friction between his shoes and the runway is 0.98. What is the greatest acceleration the man can give the airplane? Assume that the airplane is on wheels that turn without any frictional resistance. Number i Units

As in problem 80, an 87-kg man plans to tow a 111000-kg airplane along a runway by pulling horizontally on a cable attached to it. Suppose that he instead attempts the feat by pulling the cable at an angle of 6.4° above the horizontal. The coefficient of static friction between his shoes and the runway is 0.98. What is the greatest acceleration the man can give the airplane? Assume that the airplane is on wheels that turn without any frictional resistance. Number i Units

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter4: Newton's Laws Of Motion

Section: Chapter Questions

Problem 74AP: (a) What is the minimum force of friction required to hold the system of Figure P4.74 in...

See similar textbooks

Similar questions

Why is the following situation impossible? A 1.30-kg toaster is not plugged in. The coefficient of static friction between the toaster and a horizontal countertop is 0.350. To make the toaster start moving, you carelessly pull on its electric cord. Unfortunately, the cord has become frayed from your previous similar actions and will break if the tension in the cord exceeds 4.00 N. By pulling on the cord at a particular angle, you successfully start the toaster moving without breaking the cord.
(a) If half of the weight of a small 1.00103-kgutility truck is supported by its two drive wheels, s hat is the maximum acceleration it can achieve on dry concrete? (b) Will a metal cabinet lying on the wooden bed of the truck slip if it accelerates at this rate? (c) Solve both problems assuming the truck has four-steel drive.
Give reasons for the answers to each of the following questions: (a) Clan a normal force be horizontal? (b) Can a normal force be directed vertically downward? (c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can the normal force be different in magnitude from the gravitational force exerted on the ball? (d) Can the force exerted by the floor on the hall be different in magnitude from the force the ball exerts on the floor?
If a single constant force acts on an object that moves on a straight line, the objects velocity is a linear function of time. The equation v = vi + at gives its velocity v as a function of time, where a is its constant acceleration. What if velocity is instead a linear function of position? Assume that as a particular object moves through a resistive medium, its speed decreases as described by the equation v = vi kx, where k is a constant coefficient and x is the position of the object. Find the law describing the total force acting on this object.
(a) What is the minimum force of friction required to hold the system of Figure P4.74 in equilibrium? (b) What coefficient of static friction between the 100.-N block and the table ensures equilibrium? (c) If the coefficient of kinetic friction between the 100.-N block and the table is 0.250, what hanging weight should replace the 50.0-N weight to allow the system to move at a constant speed once it is set in motion? Figure P4.74
(a) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her mass on that knee? (b) During strenuous exercise, it is possible to exert forces to the joints that are easily 10 times greater than the weight being supported. What is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pam.
Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state of motion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.
Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state ofmotion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.
causing the crates to 9. In a pickup game of dorm shuffleboard, students crazed by final exams use a br to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed fro rest through a distance of 0.90 m by the horizontal 25 N force from the broom then has a speed of 1.60 m/s, what is the coefficient of kinetic friction between the book and floor? d hase is retarded by e
Côncept Example 9. A 225-kg crate rests on a surface that is inclined em are presented in Multiple- above the horizontal at an angle of 20.0°. A horizontal force (magnitude 535 N and parallel to the ground, not the incline) is required to start the into solving crate moving down the incline. What is the coefficient of static friction s an angle of hetic friction * initial speed between the crate and the incline? 119. The drawing shows a 25.0-kg crate that 球 Is initially at rest. Note that the view is one look- ing down on the top of the crate. Two forces, F, and F, are applied to the crate, and it begins to +y does the box 2- move. The coefficient of kinetic friction =0.350. 55.0 es, a force of 54.0 N F, between the crate and the floor is u = current of the Determine the magnitude and direction (relative Top view of east. When in a direction to the x axis) of the acceleration of the crate. ADN (NG N 88.0 N
You are trying to slide a heavy trunk across a horizontal floor. The mass of the trunk is 85 kg, and you need to exert a force of 3.3 x 102 N parallel to the ground to make it just begin to move. a). Determine the coefficient of static friction between the floor and the trunk. After the trunk starts moving, you continue to push with this force. The trunk reaches a speed of 2.0 m/s after 5.0 s. Calculate the coefficient of kinetic friction.
Box 1, a wooden box, has a mass of 8.60 kgand a coefficient of kinetic friction with theinclined plane of 0.35. Box 2, a cardboard box,sits on top of box 1. It has a mass of 1.30 kg.The coefficient of kinetic friction between thetwo boxes is 0.45. The two boxes are linked bya rope which passes over a pulley at the top ofthe incline, as shown in the diagram. The inclined plane is at an angle of 38.0° with respect to thehorizontal. (a) What is the acceleration of each box? (b) Now consider all surfaces are frictionless. Then calculate the amount of force with directionto prevent the sliding of the boxes.