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...
-
In Zimbabwe the growth rate of the quantity of money increased from 52 percent a year to 66,700 percent a year in 2007. Accordingly the inflation rate in Zimbabwe skyrocketed, from 56 percent a year...
-
Indicate the type of flow given by \(\phi=\sqrt{r} \cos (\theta / 2)\). Calculate and plot typical streamlines.
-
Take the role of an investment analyst at Merrimack Lowell. It is your job to recommend investments for your client. The only information you have is the following ratio values for two companies in...
-
Consider a (11,7) cyclic code generated g(x)=1+x+x+ using, Design a feedback register decoder(syndrome calculation circuit) for the same. Illustrate the decoding (syndrome)procedure with the message...
-
Assume Nordstrom prepares budgets quarterly. The following information is available for use in planning the second quarter budgets for one of its stores (in thousands). NORDSTROM Balance Sheet March...
-
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...
-
Which of the following characteristics is typical of a eukaryotic gene that can be transcribed? a. The core promoter is wrapped around a nucleosome. b. The core promoter is found in a nucleosome-free...
-
A business had always made an allowance for doubtful debts at the rate of 3 per cent of accounts receivable. On 1 January 2015 the amount for this, brought forward from the previous year, was 400....
-
(A) Explain why a provision may be made for doubtful debts. (B) Explain the procedure to be followed when a customer whose debt has been written-off as bad subsequently pays the amount originally...
-
A business, which started trading on 1 January 2014, adjusted its allowance for doubtful debt at the end of each year on a percentage basis, but each year the percentage rate is adjusted in...
-
Three of the accounts in the ledger of Charlotte Williams indicated the following balances at 1 January 2017: Insurance paid in advance 562; Wages outstanding 306; Rent receivable, received in...
-
A business makes an allowance for doubtful debts of 3% of accounts receivable, also a provision of 1% for discount on accounts receivable. On 1 January 2015 the balances brought forward on the...
-
Michaela is a payroll accountant for Top Table Industries. She is asked to explain the differences between exempt and nonexempt employees. What job elements should she highlight as the difference...
-
A heat engine has a heat input of 3 Ã 104 Btu/h and a thermal efficiency of 40 percent. Calculate the power it will produce, in hp. Source 3 x 10 Btu/h 40% HE Sink
-
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?
-
As a HR manager identify and assess the drivers of high and low employment engagement. Support your arguments with specific examples. Please leave reference.
-
How does digital technology influence both the issues of credentialism and social/cultural reproduction? Does the technology help students? Does it hurt students? Please defend your answers using...
-
Using the four-drive motivation theory, as described by McShane, discuss how this experience is impacting Sophia's motivation ?
Study smarter with the SolutionInn App