What is the first step in recording an impression?
Solved
Show answers
More tips
- C Computers and Internet What is Web 2.0 and How Does it Work?...
- S Style and Beauty Is Photoepilation the Solution to Unwanted Hair Forever?...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
Answers on questions: Biology
- B Biology You receive to urine samples - one from the patient in the morning, and one from the afternoon. would you expect the urinalysis to have the same results? why or why...
- B Biology since records began in 1958, the carbon dioxide concentration in the atmosphere has decreased. a. trueb. false...
- B Biology When cells communicate by the signaling process, one cell produces a that must be received by the on or in the responding cell. a. signaling particle; signal enzyme...
- B Biology Write an equation here that shows the relationship between gross and net primary production....
- B Biology how do the methods of reproduction used by nonvascular and vascular plants determine the types of environments in which they can live...
- B Biology Pleas help me this is due on wensday. Im willing to give all my points an mark you brainlest just click the link and tell me the link and answers to the table...
- B Biology May someone please help me on this ?...
- B Biology The lamina propria and mucous epithelium are components of the...
- B Biology Dominant plant species in the community include 1) pinte trees Hickory frees 3 Mosses 4 y Lichens....
- B Biology WHOEVER ANSWERS THIS CORRECT GETS BRAINLIEST ANSWER...
Ответ:
a = 3.608 ft/s²
T = 5.977 kip
Explanation:
Angle of inclined track is not given. It is 5 degree as shown in attached image 1.
Given data:
Weight of boxcar A = Wα = 20,000 lb
Weight of boxcar B = Wb = 30,000 lb
Coefficient of kinetic friction = υk = 0.5
angle of inclined track = 5 degree
Value of g = 32.2 ft/s²
Solution:
These boxcars are moving therefore,
∑Fₓ = ma
∑
Car A
Use ∑
Forces acting in Y-axis are weight and its counter N (as shown in Free body diagram). Weight is Negative (acting downward) while N is positive (acting upward)
∑ Nα - Wα*Cos(∅) = 0
∑ Nα - 20,000*Cos(5°) = 0
∑ Nα - 20,000*0.9962 = 0
∑ Nα - 19,924 = 0
Nα = 19,924
Use ∑Fₓ = maₓ
Forces acting in x-axis are Fa, T and horizontal component of weight and force having acceleration a (as shown in Free body diagram). Horizontal component of weight and Tension (T) are Negative (acting in negative X-axis direction) while Fa is positive (acting in positive X-axis direction)
∑Fₓ = maₓ
(0.5*19924) - 20,000*Sin(5°) - T = (20,000/32.2)*a
9962 - 1744 - T = 621.12*a
8218 - T = 621.12*a .................. Eq(1)
Both cars
∑Fₓ = maₓ
Forces acting are; horizontal component of weights, Fa and force having acceleration a (as shown in Free body diagram).
9962 - 1744 - 2616 = 621.12/a + 931.68/a
5602 = 1552.8 / a
⇒ a = 3.608 ft/s²
put a = 3.608 ft/s² in equation (1)
⇒ T = 8218 - 621.12*3.608
T = 8218 - 2240.79
T = 5977.21 lb
T = 5.977 kip