1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Strike441 [17]
2 years ago
14

If the room radius is 4.5 m, and the rotation frequency is 0.8 revolutions per second when the floor drops out, what is the mini

mum coefficient of static friction so that the people will not slip down?
Physics
1 answer:
kondaur [170]2 years ago
3 0
<span>The force of static friction F equals the coefficient of friction u times the normal force N the object exerts on the surface: F = uN. N is the centripetal force of the wall on the people; N = ma_N, where m is the mass of the people and a_N is the centripetal acceleration. The people will not slip down if F is greater than the force of gravitation: F = uma_N > mg, or u > g/a_N. a_N is the velocity v of the people squared divided by the radius of the room r: a_N = v^2/r. The circumference of the room is 2 pi r = 28.3 m. So v = 28.3 * 0.8 m/sec = 22.6 m/sec. So a_N = 114 m/sec^2. g = 9.81 m/sec^2, so u must be at least 9.81/114 = 0.086.</span>
You might be interested in
An atom is chemically stable when it’s outer_____ is completely filled with _____.
Svetlanka [38]

an atom is chemically stable when its outer layer is completely filled with energy. im pretty sure this is right

8 0
3 years ago
A ventilating fan is operated by 0.5hp electric motor. How much work in joules can the fan do in 3 hours? (I need the answer asa
shtirl [24]

Answer:

Power= 0.5hp = 375W

T = 3hrs = 10800s

Power = Work done/ Time

Work = Power * Time = 375 * 10800 = 4050000J

3 0
3 years ago
State Archimedes' principle.​
Paraphin [41]

Answer:

Archimedes Principle states that "any body completely or partially submerged in water is acted upon by an upthrust force which is equal to the magnitude of Weight of the body."

3 0
3 years ago
Read 2 more answers
The mass of Jupiter is about ___ times the mass of Venus. help!?
Angelina_Jolie [31]
Three times larger I think.

4 0
2 years ago
Please round 1045.2 to three significant digits
Anton [14]

1045

if this is actually if this is right tell me

5 0
3 years ago
Read 2 more answers
Other questions:
  • Antiballistic missiles (ABMs) are designed to have very large accelerations so that they may intercept fast-moving incoming miss
    14·1 answer
  • Ampres law is often written contourintegral B vector (r vector) middot dl vector = mu_0I_enclosed. The integral on the left is
    15·1 answer
  • Covalent bonds are characterized by...
    7·2 answers
  • Keisha drew a diagram to compare two of the fundamental forces. A venn diagram of 2 intersecting circles with the left circle la
    8·1 answer
  • PLEASE HELP WITH ONE QUESTION!
    7·1 answer
  • How are all paths that have a displacement of zero similar?
    6·2 answers
  • Define Velocity.<br>Have a Nice Day Ahead​
    5·1 answer
  • Define 1 unit electricity​
    14·1 answer
  • In the figure, a baseball is hit at a height h = 1.20 m and then caught at the same height. It travels alongside a wall, moving
    6·1 answer
  • 7. Explain why observations of comets and shooting stars presented challenges to ancient astronomers using
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!