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
grin007 [14]
3 years ago
10

The block brake consists of a pin-connected lever and friction block at B. The coefficient of static friction between the wheel

and the lever is μs = 0.3, and a torque of 5 N⋅m is applied to the wheel. Determine if the brake can hold the wheel stationary when the force applied to the lever is (a) P = 30 N, (b) P = 70 N.
Physics
2 answers:
erastovalidia [21]3 years ago
8 0

Answer:

B

Explanation:

Anika [276]3 years ago
7 0

Answer:

a) Insufficient

b) Sufficient

Explanation:

To hold lever:

Sum of moments about point O center of wheel = 0

Fb * 0.15 - 5 =0

Fb = 33.33N

Contact force Nb:

Nb = (Fb/u) = (33.333 / 0.3) = 111.1 N

Sum of moments about point A lever pin joint = 0

Preq * 0.6 - 111.1*0.2 - 33.33*0.05 = 0

Preq = 39.8 N

part a

P = 30N < Preq = 39.8N

Hence, insufficient

part b

P = 70N > Preq = 39.8N

Hence, sufficient

You might be interested in
what can you infer about copper and sliver based on their position relative to each other on the periodic table?
timofeeve [1]
Both are metals and are good conductors of electricity and heat.
4 0
3 years ago
Read 2 more answers
how does the electric force between two charged particles change if the distance between them is increased by a factor of 3? a.
Aleksandr [31]

how does the electric force between two charged particles change if the distance between them is increased by a factor of 3?

a. it is reduced by a factor of 3

4 0
3 years ago
Can someone explain how the weight of the block is 10.26N, with reference to an appropriate law of motion?
spayn [35]

this process is called parellelogram method of resolving vectors.

5 0
3 years ago
What is a real life example of something impermeable? (please help now!!) (due tomorrow!!)
Nutka1998 [239]
Impermeable is a substance that is water proofed e.g glass, aluminium e.t.c <span />
6 0
3 years ago
Why are some substances dissolve both polar and nonpolar substances?
dlinn [17]

Answer:

Because water is polar and oil is nonpolar, their molecules are not attracted to each other.<em> polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.</em>

<em></em>

<em></em>

<em>please mark me as the brainliest :) </em>

<em></em>

<em>use your brain :)</em>

8 0
3 years ago
Other questions:
  • Help ... plz
    14·1 answer
  • Two infinite, uniformly charged, flat surfaces are mutually perpendicular. One of the sheets has a charge density of +60 pC/m2,
    9·2 answers
  • Great amounts of heat are found at hotspots. What is the source of this heat?
    14·1 answer
  • How does a sound wave form
    9·1 answer
  • The helicopter was deformed and destroyed in the _______ collision.
    15·2 answers
  • 1) Air modeled as an ideal gas enters a well-insulated diffuser operating at steady state at 270 K with a velocity of 180 m/s an
    12·1 answer
  • Which of the following are binary ionic compounds?
    11·1 answer
  • EZ QUESTION!!!<br> Why are bananas curved?
    6·2 answers
  • At what height does a 1000-kg mass have potential energy of 1J relative to the ground?
    10·1 answer
  • During an isothermal process, 10 j of heat is removed from an ideal gas. What is the work done by the gas in the process?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!