Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
JerJason
Group Title
Suppose the coefficient of kinetic firxxtion between mass a and a plane is .10 and mass A and B is 2.7kg. As Mass B moves down, determine the magnitude of mass A and B given an angle of 31 degrees. What is the smallest value of kinetic friction to keep the system from accelerating?
 2 years ago
 2 years ago
JerJason Group Title
Suppose the coefficient of kinetic firxxtion between mass a and a plane is .10 and mass A and B is 2.7kg. As Mass B moves down, determine the magnitude of mass A and B given an angle of 31 degrees. What is the smallest value of kinetic friction to keep the system from accelerating?
 2 years ago
 2 years ago

This Question is Closed

JerJason Group TitleBest ResponseYou've already chosen the best response.0
I've figured out wha the acceleration is (2.0m/s^2 \[(2.7kg)(9.80m/s^2)(1\sin31.10\cos31)/5.4kg=2.0m/s^2\]
 2 years ago

JerJason Group TitleBest ResponseYou've already chosen the best response.0
I also know the component forms of box A is Fy=22.68N and Fx=13.62N
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
both boxes are in contact?
 2 years ago

JerJason Group TitleBest ResponseYou've already chosen the best response.0
Both boxes are connected to a string on a pulley, Box B is hanging from the pulley and box A is on an incline.
 2 years ago

salini Group TitleBest ResponseYou've already chosen the best response.0
u can draw the freebody diagram showing the forces acting on the box A and B?
 2 years ago

hosein Group TitleBest ResponseYou've already chosen the best response.0
fig isdw:1333223131753:dwso we have three equation:\[m _{B}gT=m_{B}a\]\[m_{A}gsin \theta\mu_{k}m_{A}gcos \theta=m_{A}a\]\[m_{A}+m_{B}=2.7\]so we can solve for mB & mA
 2 years ago

hosein Group TitleBest ResponseYou've already chosen the best response.0
for 2nd part i think : we get 2nd formula equal to 0 and solve for mu k
 2 years ago

JerJason Group TitleBest ResponseYou've already chosen the best response.0
^Sorry about the wait, but yeah it looks just like the image hosein drew
 2 years ago

hosein Group TitleBest ResponseYou've already chosen the best response.0
sorry i forgot this: theta oughtbe 60 degrees in formulas
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.