Question
The puck in the figure has a mass of 0.17 kg. Its original distance from the...
The puck in the figure has a mass of 0.17 kg. Its original distance from the center of rota- tion is 41.2 cm, and the puck is moving with a speed of 67.5 cm/s. The string is pulled downward 11.8 cm through the hole in the frictionless table.
What is the magnitude of the work was done on the puck? Treat the hockey puck as a point mass. Answer in units of J.
41.2 cm 67.5 cm/s 0.17 kg
Answers
Given mass of puck is m = 0.17 kg
r1 = 41.2 cm = 0.412 m, v1 = 67.5 cm/s = 0.675 m/s
r2 = 41.2-11.8 cm = 29.4 cm = 0.29 m
we know that angular momentum is constant
by conservation of angular momentum
L1 = L2
m v1r1 = m v2r2
V2 = v1r1/r2
= 0.675*0.412/0.29
= 0.959 m/snow change in k.e = 0.5*m(v2^2 - v1^2)
= 0.5*0.17(0.959^2 -0.675^2) J
which is equal to work done on puck to pull it to a distance of 11.8 cm down
from work energy theorem , work done = change in k.e
Similar Solved Questions
1 answers
Polarix is a retailer of ATVs (all-terrain vehicles) and accessories. An income statement for its Consumer...
Polarix is a retailer of ATVs (all-terrain vehicles) and accessories. An income statement for its Consumer ATV Department for the current year follows. ATVs sell for $3,400 each. Variable selling expenses are $270 per ATV. The remaining selling expenses are fixed. Administrative expenses are 40% var...
1 answers
11. In the absence of a well-developed local capital market borrowers might go to this World...
11. In the absence of a well-developed local capital market borrowers might go to this World Bank organization to find investment funds. What is ______________ 12. This overall measure provides an assessment of short term inflows and outflows of death in a country(things like trade, income on foreig...
1 answers
Who would have control of setting limits on campaigns if the constitution is changed according to...
Who would have control of setting limits on campaigns if the constitution is changed according to Senator Udall's proposal? A. The Federal Elections Commission B. State Attorney Generals C. State Courts D. The Legislatures and Congress...
1 answers
The mass of a killer whale is 950,000,000 milligrams. What is its mass, in kilograms, expressed in scientific notation?
The mass of a killer whale is 950,000,000 milligrams. What is its mass, in kilograms, expressed in scientific notation?...
1 answers
16. GEOMETRY A triangle has an area of 3x2+ 9x-54 square centimeters. f the height of...
16. GEOMETRY A triangle has an area of 3x2+ 9x-54 square centimeters. f the height of the triangle is x+6 centimeters, find the length of the base....
1 answers
EBook {Exercise 5,08) The following data were collected by counting the number of operating rooms in...
eBook {Exercise 5,08) The following data were collected by counting the number of operating rooms in use at Tampa General Hospital over a 20 day period: On four of the days only one operating room was used, on six of the days two were used, on seven of the days three were used, and on three days all...
1 answers
How close to the right edge of the 56 kg picnic table shown in can a...
How close to the right edge of the 56 kg picnic table shown in can a 90 kg man stand without the table tipping over? Express your answer to two significant figures and include the appropriate units....
1 answers
How many excess electrons are on a ball with a charge of -5.00 X 10 negative 17 C?
How many excess electrons are on a ball with a charge of -5.00 X 10 negative 17 C?...
1 answers
The western gull (Larus occidentalis) is a large white-headed bird found along the west coast of...
The western gull (Larus occidentalis) is a large white-headed bird found along the west coast of North America, from Mexico to BC. The gulls nest in early May, typically laying between 1 and 3 eggs. Suppose that a researcher suspects that the mean weight of the first egg laid of a clutch is differen...
1 answers
0 2018 Cengage Leaminge. May not be scanned, copied or duplicated, or posted to a publicly...
0 2018 Cengage Leaminge. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part, except for use as permitted in a license distributed with a certain product or service or otherwise on a password-protected website or school-approved leaning 8 Calcula...
1 answers
Part 1 Part 2 Required Information [The following information applies to the questions displayed below The...
Part 1 Part 2 Required Information [The following information applies to the questions displayed below The following financial statements and additional information are reported IKIBAN INC. Comparative Balance Sheets June 30, 2817 and 2016 2816 2017 As sets $73, 100 101,e0e 87,880 6,800 268,...
1 answers
Oiven cost the marginal revenue, marginal and fixed cost : MR = 1600-8Q MC = 4Q...
oiven cost the marginal revenue, marginal and fixed cost : MR = 1600-8Q MC = 4Q + 400 FC = 50,000 0 The optimal profit occurs when. (totadrevenue marginal revenue is equal to 1 ltorde Cost/ Marginal cost), ( fill in blanks with one of options) 3 find the quantity of that maximizes profits answer cho...
1 answers
A wire has a current pointing toward the top of the page. What is the direction...
A wire has a current pointing toward the top of the page. What is the direction of magnetic field, caused by the current, at point a, which is to the wire's left? MI 6 toward the bottom of the page out of the page toward the top of the page D night...
1 answers
You have a portfolio with a beta of 1.18. What will be the new portfolio beta...
You have a portfolio with a beta of 1.18. What will be the new portfolio beta if you keep 87 percent of your money in the old portfolio and 13 percent in a stock with a beta of 0.59? (Round your answer to 2 decimal places.)...
1 answers
The Gourmand Cooking School runs short cooking courses at its small campus. Management has identified two cost drivers i...
The Gourmand Cooking School runs short cooking courses at its small campus. Management has identified two cost drivers it uses in its budgeting and performance reports—the number of courses and the total number of students. For example, the school might run two courses in a month and have a to...
1 answers
Hi, can you help me provide the step-by-step working solution for part (b) of the above...
Hi, can you help me provide the step-by-step working solution for part (b) of the above question? 12 A nickel-titanium alloy is used to make components for jet turbine aircraft engines. Cracking is a potentially serious problem in the final part, as it can lead to non-recoverable failure. A test is ...
1 answers
Question 1 (2 points) The US Constitution establishes a federal system of government in which all...
Question 1 (2 points) The US Constitution establishes a federal system of government in which all rights not specifically granted to the Federal government are retained by the states. Question 1 options: True False Question 2 (2 points) The United States Constitution guarantees anybody who...