Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Chapter 7, Problem 4PLA
To measure the coefficient of kinetic friction by sliding a block down an inclined plane the block must be in equilibrium. What experimental condition must you try to accomplish that will assure you that the block is in equilibrium?
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At a post office, a parcel that is an m kg box slides down a ramp inclined at an angle θ with the horizontal, as shown. The coefficient of kinetic friction between the box and the ramp is μK, and the coefficient of static friction for the same is μS. Notice that the coordinate axes have been chosen with the x axis directed up the incline, as shown.
1. Enter a numeric answer for the magnitude of the acceleration in meters per squared seconds when the angle of the incline is 33° and the coefficient of kinetic friction is 0.075.
2. Using the numbers from the previous step, give a numeric answer for the time in seconds that elapse when the package, initially at rest, travels a distance of 4.75 m down the ramp.
3. Using the numbers from the previous steps, give a numeric answer for the speed of the package at the moment it has traveled a distance of 4.75 m down the ramp.
A contestant in a winter sporting event pushes an mm kg block of ice across a frozen lake by applying a force FF at an angle θθ below the horizontal as shown. Assume that the coefficient of static friction for ice on ice is 0.0300, and the coefficient of kinetic friction for the same is 0.0100. Let to the right be the positive x direction and up be the positive y direction for your equations.
Obtain a numeric value, in newtons, for the magnitude of the maximum applied force, F, consistent with static friction when the force makes an angle 32° below the horizontal and the mass of the block is 63 kg.
Obtain a numeric value for the acceleration, a, in meters per squared seconds, when the mass of the block is 63 kg and the angle of the rope is 32° below the horizontal.
A contestant in a winter sporting event pulls an m kg block of ice across a frozen lake by applying a force F at an angle θ above the horizontal as shown. Assume that the coefficient of static friction for ice on ice is 0.0300, and the coefficient of kinetic friction for the same is 0.0100. Let to the right be the positive x direction and up be the positive y direction for your equations.
Obtain a numeric value, in newtons, for the magnitude of the maximum applied force, F, consistent with static friction when the force makes an angle 22° above the horizontal and the mass of the block is 34 kg.
Obtain a numeric value for the acceleration, a, in meters per squared seconds, when the mass of the block is 34 kg and the angle of the rope is 22° above the horizontal.
Chapter 7 Solutions
Physics Laboratory Manual
Ch. 7 - For kinetic friction the direction of the...Ch. 7 - The two coefficients of friction discussed in this...Ch. 7 - Suppose a block of mass 25.0 kg rests on a...Ch. 7 - To measure the coefficient of kinetic friction by...Ch. 7 - A 5.00 kg block rests on a horizontal plane. A...Ch. 7 - Both types of coefficient of friction are...Ch. 7 - For either type of coefficient of friction, what...
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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
- A box of mass 35Kg is placed on an inclined plane, that is at a 38 degree angle with the horizontal. C. determine the normal FN (Perpindecular Force) and the parallel force D. Assume the plane is frictionless. Find the acceleration of the block down the planearrow_forwarda 45kg gymnast wedges himself between two closely spaced vertical walls by pressing his hands and feet against the walls. What is the magnitude of the friction force on each hand and foot? Assume they are all equal. Express your answer with the appropriate units.arrow_forwardAt a post office, a parcel that is an m kg box slides down a ramp inclined at an angle θ with the horizontal, as shown. The coefficient of kinetic friction between the box and the ramp is μK, and the coefficient of static friction for the same is μS. Notice that the coordinate axes have been chosen with the x axis directed up the incline, as shown. Enter a numeric answer for the magnitude of the acceleration in meters per squared seconds when the angle of the incline is 21° and the coefficient of kinetic friction is 0.055. Kinematics may help you here. Using the numbers from the previous step, give a numeric answer for the time in seconds that elapse when the package, initially at rest, travels a distance of 4.5 m down the ramp. Using the numbers from the previous steps, give a numeric answer for the speed of the package at the moment it has traveled a distance of 4.5 m down the ramp.arrow_forward
- Hey Please help me here. LAWS OF MOTION. 1.1) Using Newton's laws, find different expressions for the magnitude of the Normal using both the x- direction and the Y-direction of the chosen set of axes. Considering a stationary object of mass M on a rough surface inclined at an angle (theta). 1.2) From the two expressions for the Normal force magnitude, find the relationship between the Static coefficient of friction and the angles of inclination, (theta)arrow_forwardA 10-kilogram crate is at rest on a horizontal surface. The coefficient of static friction between the surface and the crate is 0.4 and the coefficient of kinetic friction is 0.3. Find the force of friction exerted on the block and find the kinetic frictionarrow_forwardA block is pushed across a horizontal surface by the force shown. If the coefficient of kinetic friction between the block and the surface is 0.2, F = 29 N, theta = 32°, and M = 3 kg, what is the magnitude of the acceleration of the block?arrow_forward
- First, realize that there is a relationship between the length of the book (l), the height to which it was lifted (h) and the angle (θ) it makes with the horizontal. What is the equation you can use to find coefficient of static frictionarrow_forwardShould coefficients of static and kinetic friction always be the same for any two materials? Provide equations and examples pleasearrow_forwardA block is pulled along a rough level surface at constant speed by the force P to the right . FN, the normal force on the block has an upward direction; and f, the force of kinetic friction is opposite the direction of P. What is the magnitude of FN?arrow_forward
- A 10 kg box is motionless on the floor. If the coefficient of static friction is 0.4 and the coefficient of kinetic friction is 0.3 (between the box and the floor), find the force required to start the block in motion.arrow_forwardExplain why is it necessary that the block should be moving with uniform velocity in determining the force of kinetic friction.arrow_forwardThe coefficient of friction is an empirical value. For example, the static coefficient offriction is measured by placing an object on a surface with a variable angle of inclination.The inclination is slowly increased until the object begins to slide. This slip angle is calledthe critical angle θc. Algebraically, show thattan θc = µswhere µs is the static coefficient of friction between the object and the surface.arrow_forward
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