
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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3) What is the dierent between static and kinetic friction?
b) Why does the static friction involve an inequality while kinetic friction involves an equation?
c) Does kinetic friction depend on the normal force?
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- Must answer BOTH parts for upvotearrow_forwardHow do you calculate the friction coefficient of a surface with various areas of different frictions?arrow_forward5) A box with mass m=1.25 kg rests on the top of a bar. The coefficient of static friction between the box and the bar is μs=0.73 and the coefficient of kinetic friction is μk=0.39. a) Write an expression for Fm the minimum force required to produce movement of the box on the top of the bar. b) Solve numerically for the magnitude of the force Fm in Newtons. c) Write an expression for a, the box's acceleration, after it begins moving. (Assume the minimum force, Fm, continues to be applied.) d) Solve numerically for the acceleration, a in m/s².arrow_forward
- you need to push the couch 4 m to the other side of the room. After the initial push to get it going you push on the 90 Kg couch with a steady horizontal force of 600 N. The coefficient of kinetic friction between the couch and the floor is 0.6. 1) what is the magnitude and direction of the fictional force on the couch? 2) what is the magnitude and direction of the net force on the couch? 3) what is the magnitude and direction of the acceleration of the couch?arrow_forwardacmillan Learning At a mail sorting facility, packages slide down a ramp but are stopped part way down the ramp so that they can be scanned. While the packages are scanned, they are held in place by a horizontal force from a spring-loaded arm. The ramp makes an angle of 0 = 41.5° with the horizontal. The package has a mass of 8.25 kg. The coefficient of static friction between the ramp and the package is 0.385. Calculate the minimum force Fmie that this arm must apply to hold a package on the ramp. Fmin = of Narrow_forwardQuestion 4 Which of the following best describes the directions of friction and normal force? Your answer: Friction is always horizontal and normal force is always vertical. Friction is always horizontal and normal force is always perpendicular to the surface. Friction is always parallel to the surface and nomal force is always vertical. Friction is always parallel to the surface and normal force is always perpendicular to the surface. There is no consistent pattem.arrow_forward
- A 40 N box is resting on a table when a 20 N force is applied to it horizontally. The coefficients of static and kinetic friction are 0.3 and 0.1, respectively. Which of the following best describes the resulting motion of the box? The motion of the box cannot be determined with the given information. The box accelerates in the direction of the applied force. The box remains at rest. The box moves with a constant velocity in the direction of the applied force.arrow_forwardContinuing from problem 8, the force F is increased to 50 N. The data are as follows: a) The object's mass is 4 kg, b) g = 10 m/s². c) Coefficient of the kinetic friction = 0.5 / sqrt(3) and coefficient of the static friction = 1 / sqrt(3). d) Magnitude of the force F = 50 N. 30⁰ F What is the acceleration of the object in m/s²? Round to the nearest decimal.arrow_forward
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