In Figure a climber leans out against a vertical ice wall that has negligible friction. Distance a
Question:
In Figure a climber leans out against a vertical ice wall that has negligible friction. Distance a is 0.914 m and distance L is 2.10 m. His center of mass is distance d = 0.940 m from the feet-ground contact point. If he is on the verge of sliding, what is the coefficient of static friction between feet and ground?
com a
Step by Step Answer:
As shown in the freebody diagram the forces on the climber FN consist of the normal forces F on his ...View the full answer
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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
-
In Figure a climber with a weight of 533.8 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass....
-
A uniform ladder of mass m and length l leans at an angle θ against a frictionless wall, Fig. 9-60. If the coefficient of static friction between the ladder and the ground is μ, determine a...
-
A 6.5-m ladder AB of mass 10 kg leans against a wall as shown. Assuming that the coefficient of static friction μs is the same at both surfaces of contact, determine the smallest value of μs...
-
A Contractors Ltd was formed on 1 January 2012 and the following purchases and sales of machinery were made during the first 3 years of operations. Each machine was estimated to last 10 years and to...
-
Adrian was awarded an academic scholarship to State University for the 2017-2018 academic year. He received $6,500 in August and $7,200 in December 2017. Adrian had enough personal savings to pay all...
-
Baker Machine Company specializes in manufacturing precision parts for firms in the aerospace industry. Figure 9.14 shows the current block plan for the key manufacturing centers of the...
-
Stringline Ltd uses flexible budgets in order to control selling expenses. Monthly sales range from $200000 to $300000. Budgeted fixed monthly expenses for the Sales Department are $63000 for...
-
Select the best answer. 1. A town signs a ten-year capital lease by which it acquires equipment with a market value of $1million. The lease incorporates an implicit interest rate of 8 percent per...
-
I think value pricing should be used since we are increasing product and service benefits while maintaining a reasonable price. Some products, price influences consumers perception of overall quality...
-
In July 2016, Josh Gavidia and Rae Dineda, co-owners of Style Inc. (Style), a fine bespoke tailoring company, wondered how to increase the companys profitability. Over the past six years, the...
-
In Figure a 15 kg block is held in place via a pulley system. The person's upper arm is vertical; the forearm is at angle 0 = 30? with the horizontal. Forearm and hand together have a mass of 2.0 kg,...
-
In Figure one end of a uniform beam of weight 222 N is hinged to a wall; the other end is supported by a wire that makes angles = 30.0?s with both wall and beam. Find (a) The tension in the wire and...
-
Infrastructure weakness was one of the causes of the emerging market crisis in Thailand in 1997. Define infrastructure weakness, and explain how it could affect a countrys exchange rate.
-
What would your appraisal be on a one-story house 45 ft by 55 ft, at a replacement cost of $30 per sq ft allowing for a 2.5% annual depreciation over 4 years?
-
Peanut butter & chips. Recall that to improve its food allocation, Feeding America has established an internal market where local food banks are given a budget of fake money (called "Shares")...
-
How financial resources are thoughtfully allocated to avoid wastage and overlaps? Explain briefly
-
Terry and his partner declared business bankruptcy. Only Terry's personal assets were claimed by the creditors to pay for the outstanding debt. What kind of partner was Terry? Explain briefly
-
In the beginning of Case B, it is revealed that ACOS determined they would take a price increase that would guarantee a 10% margin. Upon investigation of current pricing and margin in the cost data...
-
Explain the central dogma of genetics at the molecular level.
-
Using the parallel-axis theorem, determine the product of inertia of the area shown with respect to the centroidal x and y axes. 6 in. 9 in. 9 in- 4.5 in. in. 4.5 in.
-
Angela Simpson is considering the purchase of a home entertainment center. The product attributes she plans to consider and the weights she gives to them are as follows: Angela rated the brands as...
-
A cube is placed so that one comer is at the origin and three edges are along the x-, y-, and z-axes of a coordinate system (Fig. 1.43). Use vectors to compute (a) The angle between the edge along...
-
Obtain a unit vector perpendicular to the two vectors given in Problem 1.89.
-
You are given vectors 1 = 5i - 6.5J and B = -3.5i + 7.0j. A third vector C lies in the xy-plane. Vector C is perpendicular to vector 1, and the scalar product of C with B is 15.0. From this...
-
How do change interventions leverage advanced methodologies such as appreciative inquiry, design thinking, and complexity science to foster a holistic understanding of change dynamics, unlock latent...
-
what extent do change interventions leverage digital technologies, data analytics, and artificial intelligence to enhance change effectiveness, monitor change progress, and facilitate real-time...
-
Consider a project that requires spending of $15,000 immediately and generates $6,000 per year for the next 4 years (assume each $6,000 comes at the end of each year).What is the NPV of this project?...
Study smarter with the SolutionInn App