EBK ENGINEERING MECHANICS
15th Edition
ISBN: 9780137616909
Author: HIBBELER
Publisher: VST
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Chapter 1, Problem 6P
Round off the following numbers to three significant figures: (a) 58 342 m, (b) 68.534 s, (c) 2553 N, and (d) 7555 kg.
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A spring whose natural length is 10cm exerts a force of 52N when stretched to a length of 15cm.
(a) Find the spring constant (in newtons/meter).
N/m
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(b) Find the work that is done in stretching the spring 4 cm beyond its natural length.
Round your answers to four decimals, if necessary.
Work =i
J
(c) Find the work done in stretching the spring from a length of 15cm to a length of 20cm.
Round your answers to four decimals, if necessary.
Work =
J
In Eigure 1), F900 lb, F400 lb, and
F₁-900 lb.
Figure
1 of 1
Y
Part A
Determine the magnitude of the resultant force acting on the corbel
Express your answer in pounds to three significant figures.
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VAE Ivec
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Part B
A
?
Determine the direction of the resultant force acting on the corbel measured counterclockwise from the axis
Express your answer in degrees to three significant figures.
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AVA
lb
As of October, 2016 the world's largest pumpkin weighed 1190
kilograms. In order to grow a record-setting pumpkin, the fruit's
mass must increase by an average of 18 kg/day. If we assume
that the density of raw pumpkin is approximately 0.50g/cm³ we
can convert this to an increase in volume of 1.27ft³/day.
If the volume of a spherical pumpkin is increasing at 1.27ft³/day,
then how fast is the surface area of the pumpkin changing when
the diameter of the pumpkin is 7 ft? Give the answer with two
decimal places, and include units.
Chapter 1 Solutions
EBK ENGINEERING MECHANICS
Ch. 1 - Represent each of the following as a number...Ch. 1 - Round off the following numbers to three...Ch. 1 - Represent each of the following quantities in the...Ch. 1 - Represent each of the following combinations of...Ch. 1 - The density (mass/volume) of aluminum is 5.26...Ch. 1 - Evaluate each of the following to three...Ch. 1 - Using the SI system of units, show that Eq. 1-2 is...Ch. 1 - If a man weighs 155 lb on earth, specify (a) his...Ch. 1 - Two particles have a mass of 8 kg and 12 kg,...
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- A steel pipe 50 cm long has an outside diameter of 2.2 cm and an inside diameter of 2 cm. If the density of the steel is 7.8 grams per cm³, what is the mass of the pipe, to the nearest gram?arrow_forwardConvert the quantities 300 lb s and 52 slug/ft' to appropriate SI units. SOLUTION Using Table 1-2, 1 lb 4.448 N. 4.448 N 300 lb s 300 K s 1334.5 N s 1.33 kN s Since I slug 14.59 kg and I ft 0.3048 m, then 52 slrg/14.59 kg I skrg 52 slug/ft' 0.3048 m 26.8(10') kg/m 26.8 Mg/marrow_forward1-1. Round off the following numbers to three significant figures: (a) 58 342 m, (b) 68.534 s, (c) 2553 N, and (d) 7555 kg.arrow_forward
- A man goes to a traditional market to buy a steak for dinner. He finds a 12‑oz steak (1 lbm = 16 oz) for $5.50. He then goes to the adjacent international market and finds a 300‑g steak of identical quality for $5.20. Which steak is the better buy?arrow_forward1-) Represent each of the following with SI units having an appropriate prefix: (a) 6753 ms, (b) 7656 N, (c) 0.945 kg, (d) 34.5(106) N, and (e) 0.00683 km. II-) Round off the following numbers to three significant figures: (a) 67475 m, (b) 26.554 s, (c) 7555 kg, and Evaluate each of the following to three significant figures and express each answer in Sl units using an appropriate prefix: (d) 425 GN/32.5 mm, and (e) (0.00356 Gg)(402 ms).arrow_forwardA student weighs 180 lb. Determine his mass in slugs. Convert his weight to newtons and calculate the corresponding mass in kilograms. Answers: Student mass= i Student weight = i Student mass= i slugs N kgarrow_forward
- Joules constant, 4.1868 J/cal, is an equivalence relation for 4.1868 Joules of work for 1 calorie of heat delivered to a substance. ABTU is a British Thermal Unit (another measure of heat). If1BTU-252 cal, how many kilojoules equal 5.2 BTU? Express your answer to 4 significant digits and include the proper unit.arrow_forwardWhich is a unit for power? (a) Btu (b) kWh (c) kcal (d) hph (e) kWarrow_forwardThe weight of a woman whose weight in pounds is 300, Determine her mass in slugs, from the following answers which of them is correct: 93.323 slugs 19.323 slugs 9.323 slugs 0.9323 slugsarrow_forward
- The production data for a well is as follows; 450 bbl/day of water 2800 bbl/day of 34.5o API oil 9.85 mscf/day of gas What is the density of the oil in kg/m3? (Input your answer in the space below to 2 decimal places)arrow_forwardA cylinder contains 0.12m3 of air at 1 bar and 90°c. It is compressed to 0.03m³, the final pressure being 6 bar. The index of the compression will be A. 1.292 В. 1.364 С. 1.521 D. 1.694arrow_forwardThe opposite plate is composed of a square from which a quadrant is removed. For a=6 m and a density of 3.7kg/m², XG= y a Select one: O a. 3.73 O b. 1.34 О с. 4.66 O d. 3.00 O e. 0.00 mass= (Kg) Select one: O a. 37.73 O b. 46.31 О с. 14.86 O d. 22.30 O e. 28.58 Ixx for the square (Kg.m?) Select one: O a. 1246.75 O b. 2589.41 O c. 2109.89 O d. 1598.40 O e. 831.17arrow_forward
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