While trying to decide where to hang a framed picture, you press it against the wall to
Question:
(a) What is the direction of the normal force exerted on the picture by your hand?
(b) What is the direction of the normal force exerted on the picture by the wall?
(c) What is the coefficient of static friction between the wall and the picture? The frictional force exerted on the picture by the wall can have two possible directions. Explain why.
40°
Step by Step Answer:
Consider the nature of normal and friction forces Use Newtons laws of motion a The normal force exer...View the full answer
Physics
ISBN: 978-0077339685
2nd edition
Authors: Alan Giambattista, Betty Richardson, Robert Richardson
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
-
A homeowner is trying to decide whether to heat with a furnace rated at 95% efficiency or by an electrically powered heat pump. She lives in a town where electricity is produced by a coal-fired power...
-
A homeowner is trying to decide between a high efficiency natural gas furnace with an efficiency of 97 percent and a ground-source heat pump with a COP of 3.5. The unit costs of electricity and...
-
A homeowner is trying to decide between a high-efficiency natural gas furnace with an efficiency of 97 percent and a ground-source heat pump with a COP of 3.5. The unit costs of electricity and...
-
A small project consists of three activities: A, B, and C. To start activity C, both activities A and B need to be complete. Activity A takes 3 days with a probability of 50 percent and 5 days with a...
-
Translate into dollars the balance sheet of Wyoming Leather Goods Spanish subsidiary. When Wyoming Leather Goods acquired the foreign subsidiary, a euro was worth $1.07. The current exchange rate is...
-
You are considering the purchase of a new car and are weighing the choice between a Ford Fusion Hybrid sedan (which assists a gasoline engine with an electric motor powered via regenerative braking)...
-
Do you think it is possible to have win-win negotiations? Why or why not?
-
Prepare a Statement of Revenues, Expenditures, and Changes in Fund Balance for the Broadus County Courthouse Bonds Debt Service Fund for 20X6, given the following information: Fund balance, January...
-
Adams Company makes a product that sells for $ 3 3 per unit. The company pays $ 1 9 per unit for the variable costs of the product and incurs annual fixed costs of $ 1 3 7 , 2 0 0 . Adams expects to...
-
Part 3 1 2 3 4 Pangolin company wants to research specifically with libraries in the OH state. (Solve questions according to these filters.) (Each question is independent.) (Do not forget to clear...
-
A truck driving on a level highway is acted on by the following forces: a downward gravitational force of 52 kN (kilonewtons); an upward contact force due to the road of 52 kN; another contact force...
-
In a movie, a stuntman places himself on the front of a truck as the truck accelerates. The coefficient of friction between the stuntman and the truck is 0.65. The stuntman is not standing on...
-
In Problem summarize the pertinent information obtained by applying the graphing strategy and sketch the graph of y = f(x). f(x) = e 0.5x + 4e -0.5x
-
Big Sur Company manufactures surf boards in a wide variety of sizes and styles. The following incomplete ledger accounts refer to transactions for May: Date Line Item Description Amount Materials...
-
A hypothetical element has 2 isotopes - one with a mass of 64.23 amu and a percent abundance of 26.0% and the other has a mass of 65.32 amu and a percent abundance of 74.0%. What is the weight of the...
-
Transactions UNIT FIFO ENDING UNIT AVERAGE ENDING Jan 1 Balance carry forward 100 units @ $10 each 100 1000 1000 100 1000 Jan 5 Purchased 100 units @ $11 each 100 1100 1100 100 1100 2100 @10.50...
-
Defining a recession and providing a short summary of whether Australia is in or heading for a recession with supporting evidence including what you think the causes of a recession for Australia...
-
Due to the nature of our economy and the oppression that has been in place against people of color, could we solve the problem of racial oppression before we solve the problem of economic...
-
Refer again to the scatterplot in Figure 7.24. Does there appear to be a significant correlation between the two variables? Figure 7.24 10 -5 -10 0 1 7. 2 3 4 5 6 8
-
Use translations to graph f. f(x) = x-/2 +1
-
Figure shows a 0.300 kg baseball just before and just after it collides with a bat. Just before, the ball has velocity v1 of magnitude 12.0 m/s and angle ?1 = 35.0o. Just after, it is traveling...
-
Basilisk lizards can run across the top of a water surface (Figure). With each step, a hzard first slaps its foot against the water and then pushes it down into the water rapidly enough to form an...
-
Jumping up before the elevator hits after the cable snaps and the safety system fails, an elevator cab free-falls from a height of 36 m. During the collision at the bottom of the elevator shaft, a 90...
-
Higgins Company began operations last year. You are a member of the management team investigating expansion ideas that will require borrowing funds from banks. On January 1 , the start of the current...
-
On April 1, 2021, Windsor, Inc. purchased $615,000 of 6% bonds for $639,225 plus accrued interest as an available-for-sale security. Interest is paid on July 1 and January 1 and the bonds mature on...
-
Use the graphical method for linear programming to find the optimal solution for the following problem. Minimize C=3x+15y subject to 2x + 4y 12 5x + 2y 10 and x 0, y 0.
Study smarter with the SolutionInn App