250lb block is initially at rest on the flat surface that is inclined at 30 degree. If the coefficient of kinetic friction is 0.30 and the coefficient of static friction is 0.40, find the force required to start the block moving up the plane

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Author:Paul W. Zitzewitz
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Chapter5: Displacement And Force In Two Dimensions
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A 250lb block is initially at rest on the flat surface that is inclined at 30 degree. If the coefficient of kinetic friction is 0.30 and the coefficient of static friction is 0.40, find the force required to start the block moving up the plane
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D. 93.2
-. The theoretical velocity generated by a 10 feet hydraulic head is:
A. 25.4 ft/sec*
B. 12.2 ft/sec
C. 17.9 ft/sec
D. 29.2 ft/sec
6. Water flow rate in a 6 inch diameter pipe is measured with a differential
pressure gage connected between a static pressure tap in the pipe wall and a
pitot tube located at the pipe centerline. Which volume flow rate, qin the cfs,
results in a differential pressure of 1 psi?
C. 15.6
D. 28.2
CEK
A. 2.4*
B. 0.2
7. Dry air has an average molecular weight of 28.9, consisting of 21 mole-% 0, 78
mole-% N and 1 mole-% (Argon, traces of CO,), its calculated wt. %02 is nearest
to:
С. 22.4
D. 24.6
A. 23.2*
B. 21.0
8. A noise-level meter reads the sound level in a room to be 85 dB. What is the
sound intensity in the room?
A. 6.12 x 10-4 W/m2
B. 3.16 x 10- W/m2*
ctivate Winows
C. 1.26 x 10-6 W/m-
D. 5.12 x 10-5 W/m-
OAO 150.49 %
4I 1/10
Transcribed Image Text:O Ft Page Extras O Tell me what you want to do.. O a Find 150.49% TT O Fit Width TI T Dard- From Scanner Actual Reflow Rotate Left A Link O File Attachment D. Fit Visible Rotate Right Typewriter Highlight Blank A Bookrmark Irmage Annotation Size From A From Clipboard PDF View File Sign E Audio & Video Comment Create Protect Links Insert 1.-ESAS-ONLINE-COAC... NSEP-2013-Solution-1... B. 60.3 Convert PDF to W D. 93.2 -. The theoretical velocity generated by a 10 feet hydraulic head is: A. 25.4 ft/sec* B. 12.2 ft/sec C. 17.9 ft/sec D. 29.2 ft/sec 6. Water flow rate in a 6 inch diameter pipe is measured with a differential pressure gage connected between a static pressure tap in the pipe wall and a pitot tube located at the pipe centerline. Which volume flow rate, qin the cfs, results in a differential pressure of 1 psi? C. 15.6 D. 28.2 CEK A. 2.4* B. 0.2 7. Dry air has an average molecular weight of 28.9, consisting of 21 mole-% 0, 78 mole-% N and 1 mole-% (Argon, traces of CO,), its calculated wt. %02 is nearest to: С. 22.4 D. 24.6 A. 23.2* B. 21.0 8. A noise-level meter reads the sound level in a room to be 85 dB. What is the sound intensity in the room? A. 6.12 x 10-4 W/m2 B. 3.16 x 10- W/m2* ctivate Winows C. 1.26 x 10-6 W/m- D. 5.12 x 10-5 W/m- OAO 150.49 % 4I 1/10
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2. A 250-lb block Is initially at rest on a
2. A 250-lb block Is initially at rest on a flat surface that is inclined at 30°. If the coefficient
of kinetic friction is 0.30 and the coefficient of static friction is 0.40, find the force required
to start the block moving up the plane.
2501b.
30°
Transcribed Image Text: 2. A 250-lb block Is initially at rest on a flat surface that is inclined at 30. If the coefficient of kinetic friction is 0.30 and
the coefficient of static friction is 0.40, find the force reguired to start the block moving up the plane. 25016. P 30
Transcribed Image Text:only $4.99: Homework help starts here! Q&A Library 2. A 250-lb block Is initially at rest on a 2. A 250-lb block Is initially at rest on a flat surface that is inclined at 30°. If the coefficient of kinetic friction is 0.30 and the coefficient of static friction is 0.40, find the force required to start the block moving up the plane. 2501b. 30° Transcribed Image Text: 2. A 250-lb block Is initially at rest on a flat surface that is inclined at 30. If the coefficient of kinetic friction is 0.30 and the coefficient of static friction is 0.40, find the force reguired to start the block moving up the plane. 25016. P 30
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