A 55 kg skateboarder wants to just make it to the upper edge of a quarter pipe,
Question:
A 55 kg skateboarder wants to just make it to the upper edge of a “quarter pipe,” a track that is one-quarter of a circle with a radius of 3.0 m. What speed does he need at the bottom?
Step by Step Answer:
The vertical displacement of the skateboarder is equal to the radius of the track ...View the full answer
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
Related Video
The area of a circle is given by the formula: A = ?r^2 Where A is the area, ? is a mathematical constant (approximately 3.14), and r is the radius of the circle. The radius is the distance from the center of the circle to the edge. So for example, if the radius of a circle is 5 units, the area would be: A = ?(5^2) = ?(25) = 78.5 square units Here three friends went out to a restaurant and decided to have pizza for lunch. While they were waiting for their order, one of them stepped out to take a call but promised to return in two minutes. The waiter came and presented them with the menu, and they decided to order two 10-inch pepperoni pizzas. The waiter took their order and left. Just then, the third friend returned and asked what they had ordered. They explained that they had ordered two small pepperoni pizzas as they were only three of them and it would be enough for them. However, the third friend suggested that for the same price, they could get a large pizza that would be much bigger than the two small ones. He asked the waiter for a pen and paper and proceeded to calculate the area of the two small pizzas and compared it to the area of one large pizza. The friends were amazed at how the circle measurements worked and decided to change their order from two small pizzas to one large pizza.
Students also viewed these Physics questions
-
A 55.0-kg skateboarder starts out with a speed of 1.80 m/s. He does + 80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does - 265 J of work on him. In both...
-
Jane, whose mass is 50.0 kg, needs to swing across a river (having width D) filled with man-eating crocodiles to save Tarzan from danger. She must swing into a wind exerting constant horizontal force...
-
You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 10-m-high hill, then descends 15 m to the tracks lowest point. Youve...
-
Top executive officers of Preston Company, a merchandising firm, are preparing the next years budget. The controller has provided everyone with the current years projected income statement. Current...
-
Super Clean produces and sells stain remover. Information about the budget for the year 2018 is as follows: 1. The company expects to sell 57,000 bottles of stain remover in the first quarter, 65,000...
-
FIGURE P31.38 shows the voltage across a 0.10 F capacitor. Draw a graph showing the displacement current through the capacitor as a function of time. AVe (V) 100 50- 0+ t (us) FIGURE P31.38 1 3 4 2.
-
One guideline for implementing a successful empowerment strategy is that ____________. (a) delegation of authority should be left ambiguous and open to individual interpretation (b) planning should...
-
You are considering an investment in the stock market and have identified two potential stocks (XYZ and ABC) to purchase. The historical returns for the past five years are shown in the table below....
-
6. What is the only x > 0 for which the statement below could be true? If eggs cost xc a dozen less, then it would cost 1 less for (x + 1) eggs than if eggs were xt a dozen more. EGG SALE Please do...
-
The following overview needs a proposal using word, excel and a powerpoint. Due to recent expansion, the Hudson River Accounting Corporation (HRAC) is requesting proposals for a thorough systems...
-
A spring gun shoots out a plastic ball at speed v 0 . The spring is then compressed twice the distance it was on the first shot. By what factor is the balls speed increased? Explain.
-
A particle with the potential energy shown in FIGURE Q10.8 is moving to the right at x = 5 m with total energy E. a. At what value or values of x is this particles speed a maximum? b. Does this...
-
The Polar Decomposition: Prove that every invertible matrix A has a polar decomposition, written A = QB, into the product of an orthogonal matrix Q and a positive definite matrix B > 0. Show that if...
-
Beverly Company has determined a standard variable overhead rate of $3.90 per direct labor hour and expects to incur 0.50 labor hours per unit produced. Last month, Beverly incurred 1,650 actual...
-
On January 8, the end of the first weekly pay period of the year, Regis Company's employees earned $25,760 of office salaries and $60,840 of sales salaries. Withholdings from the employees' salaries...
-
Let be an alphabet. The symmetric difference of two languages A, B C * is defined as AAB = (ANB) U (ANB). (a) Prove that if A C* is a context-free language and BC * is a finite language, the the...
-
The pressure relief valve in your hot water heater (sizedesignation: Type G) has an orifice area of 0.503 in2 . It is setto open and relieve the pressure in the heater if it 23 reaches 150psi. The...
-
3- Imagine a system that has n processes and a resource with m identical units. The maximum claim of any process is k. a. Why is the system deadlock free for all possible states of m>n (k-1)? (1...
-
At the end of last year, Roberts Inc. reported the following income statement (in millions of dollars): Looking ahead to the following year, the companys CFO has assembled the following information: ...
-
As you rewrite these sentences, replace the cliches and buzzwords with plain language (if you don't recognize any of these terms, you can find definitions online): a. Being a jack-of-all-trades, Dave...
-
What is the effect of streamlining on (a) friction drag (b) Pressure drag? Does the total drag acting on a body necessarily decrease as a result of streamlining? Explain.
-
What is flow separation? What causes it? What is the effect of flow separation on the drag coefficient?
-
What is drafting? How does it affect the drag coefficient of the drafted body?
-
Homework: ACCE 307 Question 9, E14-21 (book/static) = Sp 22 Part 1 of 4 Best Drugs is a distributor of pharmaceutical products. Its ABC system has five activities: (Click the icon to view the...
-
Exercise 10-3 (Algo) Measures of Internal Business Process Performance [LO10-3] Management of Mittel Rhein AG of Kln, Germany, would like to reduce the amount of time between when a customer places...
-
Homework Chapter 26 Question 2 of 2 View Policies Current Attempt in Progress -150 1 Cancer Corporation accumulates the following data relative to jobs started and fed during the month of June 2022...
Study smarter with the SolutionInn App