FREE Trial

Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of

Question:

Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 30o.
(a) What is the minimum value of the coefficient of static friction that will keep the snow from sliding down?
(b) As the snow begins to melt, the coefficient of static friction decreases and the snow eventually slips. Assuming that the distance from the chunk to the edge of the roof is 5.0m and the coefficient of kinetic friction is 0.20, calculate the speed of the snow chunk when it slides off the roof.
(c) If the edge of the roof is 10.0m above ground, what is the speed of the snow when it hits the ground?
Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Answer rating: 73% (19 reviews)

a Consider the freebody diagram for the snow on the roof If the snow is just ready to slip then the ...View the full answer


answer-question-section
Answered By
tutor-profile-image
Arshad Ahmad
Well, I am really new to tutoring but I truly believe a good student can be a better teacher. I have always been a topper at school. I passed my Chartered Accountancy at a very young age of 23, a rare feat for most of the students. I am really dedicated to whatever work I do and I am very strict regarding deadlines. i am always committed and dedicated to whatever work allotted to me and I make sure it is completed well within deadline and also I try to give my best in whatever I do. Hope we will have a good time studying together.
5.00+ 1+ Reviews 10+ Question Solved
Related Book For  book-img-for-question
Physics Principles with Applications

Physics Principles with Applications

ISBN: 978-0321762429

7th edition

Authors: Douglas C. Giancoli

See More Books
Question Posted:
See More Questions

Related Video

Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.

Students also viewed these Mechanics questions

Automata Computability And Complexity Theory And Applications 1st Edition - ISBN: 0132288060 - Free Book