During a rockslide, a 520 kg rock slides from rest down a hillside that is 500 m
Question:
(a) If the gravitational potential energy LI of the rock-Earth system is zero at the bottom of the hill, what is the value of U just before the slide?
(b) How much energy is transferred to thermal energy during the slide?
(c) What is the kinetic energy of the rock as it reaches the bottom of the hill?
(d) What is its speed then?
Step by Step Answer:
a The initial potential energy is U mgy 520 kg 98 ms 300 m 15310 J where y is upward and y 0 ...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
-
The coefficient of kinetic friction between the 2.0 kg block in FIGURE P7.38 and the table is 0.30. What is the acceleration of the 2.0 kg block? 2.0 kg 3.0 kg 1.0 kg FIGURE P7.38
-
The coefficient of kinetic friction between the tires of your car and the roadway is m. (a) If your initial speed is v and you lock your tires during braking, how far do you skid? Give your answer in...
-
The coefficient of kinetic friction between the surface and the larger block is 0.20, and the coefficient of kinetic friction between the surface and the smaller block is 0.30. If F = 14 N and M =...
-
Izmir A.S. issued convertible bonds at their face value of 100,000 lira on December 31, 2020. The bonds have a 10-year life with interest of 10 percent payable annually. At the date of issue, the...
-
According to this chapter, have banks been able to insulate themselves against interest rate movements? Explain.
-
Merck is considering launching a new drug called Laffolin. Merck has identied two possible demand scenarios: DEMAND LEVEL PROBABILITY 1 million patients.......30% 2 million patients........70% Merck...
-
Which theory emphasizes the importance of cooperation and participation in the workplace? A. Chaos Theory. B. Systems Theory. C. Classical Theory. D. Neoclassical Theory.
-
1. What are the main arguments that you will need to counter? That is, what are the reasons and rationalizations you will need to address? 2. What is at stake should you not convince King Bernard to...
-
Which statement best describes push marketing? Developing methods to bring the market for a product to a company Utilizing social media to improve the company image Devising ways to place a product...
-
Suppose Kenneth Cole Productions (KCP) is acquired at the end of 2012 for a purchase price of $15.25 per share. KCP has 18.5 million shares outstanding, $45 million in cash, and no debt at the time...
-
In Figure, a block slides down an incline. As it moves from point A to point-B, which are 5.0 m apart, force F acts on the block, with magnitude 2.0 N and directed down the incline. The magnitude of...
-
You push a 2.0 kg block against a horizontal spring, compressing the spring by 15 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 75 cm from where you...
-
A company has nine jobs that must be assigned to three ordered workstations. The file P08_44.xlsxlists the times required for each job, which are independent of the workstations they are assigned to....
-
Assume that Peridot operates in an industry for which NOL carryback is allowed. In its first four years of operations Peridot reported the following operating income (loss) amounts: 2018 2019 2020...
-
If logb x = 0 . 8 find the value of logb b ^ 4 square root x
-
how do strategic planning long range planning and capital budgeting differ?
-
At a fundraising dinner, four attendees win a raffle for a free vacation package. The event planner needs to match each of the four winners with one of the four vacation packages at an oceanside...
-
Evaluate Evaluate 13 S. 8 cosh (In (5t)) dt. t 13 S 8 cosh (In (5t)) t dt = |sinh ( In (65)) sinh ( In (40)) - (Round to the nearest hundredth)
-
The Rules of Conduct would most likely be violated if an auditor: a. Owns a building and leases floor space to an attestation client. b. Has an insured account with a brokerage firm audit client. c....
-
Assessing simultaneous changes in CVP relationships Braun Corporation sells hammocks; variable costs are $75 each, and the hammocks are sold for $125 each. Braun incurs $240,000 of fixed operating...
-
(a) Identify and explain any significant fraud risk factors for Dolphin. (b) For each fraud risk factor you identify in (a), explain how the risk will affect the approach to the audit of Dolphin....
-
Systematic use of solar energy can yield a large saving in the cost of winter space heating for a typical house in the north central United States. If the house has good insulation, you may model it...
-
A mercury thermometer is constructed as shown in Figure P19.47. The capillary tube has a diameter of 0.004 00 cm, and the bulb has a diameter of 0.250 cm.
-
A liquid with a coefficient of volume expansion ' just fills a spherical shell of volume Vi at a temperature of Ti (see Fig. P19.47). The shell is made of a material that has an average coefficient...
-
GlobalPetrol Corp, Exxon, and Shell want to borrow $500,000. Global Petrol Copr and Shell require a variable rate loan to finance its business resources while Exxon requires a fixed rate to meet its...
-
Question 12 Based on the following information, what is the expected return? Probability of State of Rate of Return if State of Economy Economy State Occurs Recession .24 -9.0% Normal .45 10.0% Boom...
-
elaborate on A t-test will be utilized to analyze the variables selected. A t-test is a statistical method used to evaluate the means of samples in order to make inferences about population means
Study smarter with the SolutionInn App