Part A A skateboarder starts up a 1.0-m-high, 30 ramp at a speed of 7.2 m/s....
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Part A A skateboarder starts up a 1.0-m-high, 30 ramp at a speed of 7.2 m/s. The skateboard wheels roll without friction. At the top, she leaves the ramp and sails through the air. How far from the end of the ramp does the skateboarder touch down? Express your answer with the appropriate units. View Available Hint(s) 1= 4.89 H m 0 ? Learning Goal: To practice Tactics Box 4.1 Finding the Acceleration Vector. Suppose an object has an initial velocity v ; at time t; and later, at time tf, has velocity of. The fact that the velocity changes tells us that the object undergoes an acceleration during the time interval At = tf - ti. From the definition of acceleration, a = Vf-vi tf-ti = At' we see that the acceleration vector points in the same direction as the vector Av. This vector is the change in the velocity Av = f - vi, so to know which way the acceleration vector points, we have to perform the vector subtraction of v. This Tactics Box shows how to use vector subtraction to find the acceleration vector. - Below is another motion diagram for an object that moves along a curved path. The dots are separated by equal time intervals and represent the position of the object at five subsequent instants. The vectors U21, 32, 43, and 054 represent the average velocity of the object during the four corresponding time intervals. Draw the velocity vectors-021 and -043 and the acceleration vectors a31 and 53 representing the changes in average velocity of the object during the first two and last two time intervals, respectively. Draw the vectors starting at the appropriate black dots. For the velocity vectors, the starting point, length, and direction will be graded. For the acceleration vectors, the starting point and direction will be graded. + No elements selected V43 V32 V54 The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 59 km/s. To the crew's great surprise, a Klingon ship is 130 km directly ahead, traveling in the same direction at a mere 25 km/s. Without evasive action, the Enterprise will overtake and collide with the Klingons in just about 3.8 s. The Enterprise's computers react instantly to brake the ship. Part A What magnitude acceleration does the Enterprise need to just barely avoid a collision with the Klingon ship? Assume the acceleration is constant. Hint: Draw a position-versus-time graph showing the motions of both the Enterprise and the Klingon ship. Let x0 = Okm be the location of the Enterprise as it returns from warp drive. How do you show graphically the situation in which the collision is "barely avoided"? Once you decide what it looks like graphically, express that situation mathematically. Express your answer to two significant figures and include the appropriate units. a = 8.9 Submit km s Previous Answers Request Answer ? Incorrect; Try Again; 4 attempts remaining Part A A skateboarder starts up a 1.0-m-high, 30 ramp at a speed of 7.2 m/s. The skateboard wheels roll without friction. At the top, she leaves the ramp and sails through the air. How far from the end of the ramp does the skateboarder touch down? Express your answer with the appropriate units. View Available Hint(s) 1= 4.89 H m 0 ? Learning Goal: To practice Tactics Box 4.1 Finding the Acceleration Vector. Suppose an object has an initial velocity v ; at time t; and later, at time tf, has velocity of. The fact that the velocity changes tells us that the object undergoes an acceleration during the time interval At = tf - ti. From the definition of acceleration, a = Vf-vi tf-ti = At' we see that the acceleration vector points in the same direction as the vector Av. This vector is the change in the velocity Av = f - vi, so to know which way the acceleration vector points, we have to perform the vector subtraction of v. This Tactics Box shows how to use vector subtraction to find the acceleration vector. - Below is another motion diagram for an object that moves along a curved path. The dots are separated by equal time intervals and represent the position of the object at five subsequent instants. The vectors U21, 32, 43, and 054 represent the average velocity of the object during the four corresponding time intervals. Draw the velocity vectors-021 and -043 and the acceleration vectors a31 and 53 representing the changes in average velocity of the object during the first two and last two time intervals, respectively. Draw the vectors starting at the appropriate black dots. For the velocity vectors, the starting point, length, and direction will be graded. For the acceleration vectors, the starting point and direction will be graded. + No elements selected V43 V32 V54 The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 59 km/s. To the crew's great surprise, a Klingon ship is 130 km directly ahead, traveling in the same direction at a mere 25 km/s. Without evasive action, the Enterprise will overtake and collide with the Klingons in just about 3.8 s. The Enterprise's computers react instantly to brake the ship. Part A What magnitude acceleration does the Enterprise need to just barely avoid a collision with the Klingon ship? Assume the acceleration is constant. Hint: Draw a position-versus-time graph showing the motions of both the Enterprise and the Klingon ship. Let x0 = Okm be the location of the Enterprise as it returns from warp drive. How do you show graphically the situation in which the collision is "barely avoided"? Once you decide what it looks like graphically, express that situation mathematically. Express your answer to two significant figures and include the appropriate units. a = 8.9 Submit km s Previous Answers Request Answer ? Incorrect; Try Again; 4 attempts remaining
Expert Answer:
Related Book For
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight
Posted Date:
Students also viewed these physics questions
-
The regions of + in a compound are the regions most likely to be attacked by an anion, such as hydroxide (HO - ). In the compound below, identify the two carbon atoms that are most likely to be...
-
A motorist applies the two forces shown to loosen a lug nut. The direction cosines of F are 12 13 4 cos 0x = 13, cos Oy - = Figure and cos 0 = 16 in 16 in 3 13 1 of 1 F If the magnitude of the moment...
-
What strategies or policies can Betsy use to respond to the complaint?
-
To encourage _________, leaders are encouraged to study the principles of teamwork that prevail in clinical contexts for their application to managerial planning and decision-making contexts....
-
-Mn has a cubic structure with a0 = 0.8931 nm and a density of 7.47 g/cm3. -Mn has a different cubic structure with a0 = 0.6326 nm and a density of 7.26 g/cm3. The atomic weight of manganese is...
-
Let D be the region bounded by the paraboloids z = 8 - x 2 - y 2 and z = x 2 + y 2 . Write six different triple iterated integrals for the volume of D. Evaluate one of the integrals.
-
The average Costco warehouse in the United States generates an average of \($127,000,000\) of net sales. When opening a new warehouse, Costco managers will measure the warehouse's success by how...
-
Privack Corporation has a standard cost system in which it applies overhead to products based on the standard direct labor-hours allowed for the actual output of the period. Data concerning the most...
-
How relational database such as access is used in digital environment. not too much long only one to two pages
-
You are to record transactions completed by Fabulous Furnishings during February of this year. Beginning balances for the accounts listed below have been provided in your Working Papers. This Company...
-
Read the instructions and run the simulation. Try out different parents and examine their possible gametes and their alleles. Questions How many gametes does each parent produce for each round of...
-
Nica provided the following information for the transaction occurred during August. The production plant uses the JIT costing system. Raw materials costing P750,000 were purchased All direct...
-
content area top Part 1 What is the present value of $ 3 comma 000 paid at the end of each of the next 66 years if the interest rate is 6 % per year
-
List two (2) questions that you would use to effectively communicate with the clients to confirm their understanding and knowledge about credit and finance. List a further two (2) questions that you...
-
If n = 360 and (p-hat) = 0.35, construct a 90% confidence interval. Give your answers to three decimals < p
-
Lawrence is working as a project manager. Most of his work is project cost estimation related. Lawrence reports to Christina. The project would cost $960,000. The expected inflows will be $30, 000...
-
A devastating freeze in California's Central Valley in January 2007 wiped out approximately 75% of the state's citrus crop. It turns out that the cost for a box of oranges is a function of the...
-
H.J. Heinzs annual dividends were as follows: 1990 ..............$0.540 1991.............. 0.620 1992 .............. 0.700 1993.............. 0.780 1994 .............. 0.860 1995 .............. 0.940...
-
For each of the following companies, identify whether they are a manufacturing, merchandis ing, or service firm. Exxon Mobil Co. Southwest Airlines Costco Walmart Hershey Co. Boston Consulting Group
-
Match each term to the appropriate description: a. A sportswear manufacturer takes steps to improve water efficiency by 15% per unit in ap- parel materials dyeing and finishing and to reduce waste...
-
Visit the website of at least two organizations from Exhibit 14-1, or another organization that provides a professional certification, and learn the minimum education requirement to take the exam....
Study smarter with the SolutionInn App