You place a quarter on your, initially level, textbook and slowly raise one end of the book. When the book is inclined at an angle of 18°, the quarter begins to slide. What is the coefficient of static friction at the interface between the quarter and the book? Why don't you u need to know how much a quarter weighs to answer this question? hung the most important question

You place a quarter on your, initially level, textbook and slowly raise one end of the book. When the book is inclined at an angle of 18°, the quarter begins to slide. What is the coefficient of static friction at the interface between the quarter and the book? Why don't you u need to know how much a quarter weighs to answer this question? hung the most important question

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section5.2: Friction

Problem 19PP

See similar textbooks

Similar questions

When you learn to drive, you discover that you need to let up slightly on the brake pedal as you come to a stop or the car will stop with a jerk. Explain this in terms of the relationship between static and kinetic friction.
Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks, as shown below. The coefficient of kinetic friction between the blocks and the surface is 0.25. If each block has an acceleration of 2.0m/s2to the right, what is the magnitude Fof the applied force?
A 120-kg astronaut is riding in a rocket sled that is sliding along an inclined plane. The sled has a horizontal component of acceleration of 5.0m/s2 and a downward component of 3.8m/s2 . Calculate the magnitude of the force on the rider by the sled. (Hint: Remember that gravitational acceleration must be considered.)
Two blocks are stacked as shown below, and rest on a frictionless surface. There is friction between the two blocks (coefficient of friction ). An external force is applied to the top block at an angle with the horizontal. What is the maximum force Fthat can be applied for the two blocks to move together?
A machine at a post office sends packages out a chute and down a ramp to be loaded into delivery vehicles. (a) Calculate the acceleration of a box heading down a 10.0slope, assuming the coefficient of friction for a parcel on waxed wood is 0.100. (b) Find the angle of the slope down which this box could move at a constant velocity. You can neglect air resistance in both parts.
You press your physics textbook flat against a vertical wall with your hand. What is the direction of the friction force exerted by the wall on the book? (a) downward (b) upward (c) out from the wall (d) into the wall
Physics Review A construction cranes cable lifts a 50.0-kg box upward with an acceleration of 1.50 m/s2. Find the tension in the rope. (See Section 4.5.)
When you learn to drive, you discover that you need to up slightly on the brake pedal as you come to a stop or the car will stop with a jerk. Explain this in terms of the relationship between static and friction.
One or more external forces are exerted on each object enclosed in a dashed box shown in Figure 4.2. Identify the reaction to each of these forces.
A crate is located in the center of a flatbed truck. The truck accelerates to the east and the crate moves with it, not sliding at all. What is the direction of the friction force exerted by the truck on the crate? (a) It is to the west. (b) It is to the east. (c) No friction force exists because the crate is not sliding.
A 60.0-kg and a 90.0-kg skydiver jump from an airplane at an altitude of 6.00103m , both falling in the pike position. Make some assumption on their frontal areas and calculate their terminal velocities. How long will it take for each skydiver to reach the ground (assuming the time to reach terminal velocity is small)? Assume all values are accurate to three significant digits.
A skydiver will reach a terminal velocity when the air drag equals his or her weight. For a skydiver with a large body, turbulence is a factor at high speeds. The drag force then is approximately proportional to the square of the velocity. Taking the drag force to be FD=12Av2 , and setting this equal to the skydiver's weight, find the terminal speed for a person falling "spread eagle.