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
Oduvanchick [21]
3 years ago
5

A uniform 41.0 kg scaffold of length 6.6 m is supported by two light cables, as shown below. A 74.0 kg painter stands 1.0 m from

the left end of the scaffold, and his painting equipment is 1.4 m from the right end. If the tension in the left cable is twice that in the right cable, find the tensions in the cables (in N) and the mass of the equipment (in kg). (Due to the nature of this problem, do not use rounded intermediate values in your calculations—including answers submitted in WebAssign.)
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
6 0

Step-by-step explanation:

Let

m_p = mass of the painter

m_s = mass of the scaffold

m_e = mass of the equipment

T = tension in the cables

In order for this scaffold to remain in equilibrium, the net force and torque on it must be zero. The net force acting on the scaffold can be written as

3T = (m_p + m_s + m_e)g\:\:\:\:\:\:\:(1)

Set this aside and let's look at the net torque on the scaffold. Assume the counterclockwise direction to be the positive direction for the rotation. The pivot point is chosen so that one of the unknown quantities is eliminated. Let's choose our pivot point to be the location of m_e. The net torque on the scaffold is then

T(1.4\:\text{m}) + m_sg(1.9\:\text{m}) + m_pg(4.2\:\text{m}) - 2T(5.2\:\text{m}) = 0

Solving for T,

9T = m_sg(1.9\:\text{m}) + m_pg(4.2\:\text{m})

or

T = \frac{1}{9}[m_sg(1.9\:\text{m}) + m_pg(4.2\:\text{m})]

\:\:\:\:= 423.3\:\text{N}

To solve for the the mass of the equipment m_e, use the value for T into Eqn(1):

m_e = \dfrac{3T - (m_p + m_s)g}{g} = 14.6\:\text{kg}

You might be interested in
Whats 9+10???? i really need to know this
madreJ [45]

Answer:

19

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Anita and Susanna are in a 5-mile bike race. The graph
olga2289 [7]

Answer: she stopped to change a flat tire

Step-by-step explanation:

6 0
3 years ago
The cost for a pack of 7 padlocks to $23.80. Find the unit price in dollars per padlock. If necessary, round your answer to the
Galina-37 [17]

It asks to "Find the unit price in dollars per padlock"

The phrasing "dollars per padlock" is the same as "dollars per 1 padlock"

In other words, the teacher wants to know how much 1 padlock costs.

7 padlocks : $23.80

7/7 padlocks : $23.80/7 .... divide both parts by 7

1 padlock : $3.40

We see that 1 padlock costs $3.40, so the unit cost is $3.40 per padlock

6 0
3 years ago
I'm very confused <br> Please help ASAP!!!
harina [27]

Answer:

First case

0.3m = r

0.3m = 18

m = 18/0.3

m = 60 mins.

Second case

0.3m = r

0.3 x 180 = r

r = 54 rows

Third case

0.3m = r

0.3m = 72

m = 240 minutes

Fourth case

0.3m = r

0.3 x 360 = r

r = 108 rows

Hope this helps!

4 0
3 years ago
Read 2 more answers
Find the HCF of x 2 y 3 and x 3 y
Shkiper50 [21]

Answer:

the answer is to the question is x2×y×3

7 0
2 years ago
Other questions:
  • HEYYYYY YOU......I NEED HELP
    10·2 answers
  • Need answer please ​
    13·2 answers
  • Explain part a and b
    5·1 answer
  • In a carnival game, you roll 2 dice. if the sum is 6, you receive a $5 payoff. if the sum is 12, you receive a $9 payoff. otherw
    8·1 answer
  • Find the area of the parallelogram​
    6·2 answers
  • The graph of f(x) = log x + 3 is the graph of<br> g(x) = log x translated 3 units |
    11·2 answers
  • A store sells a workout outfit that consists of a jacket, a t-shirt, and a pair of shorts. The store purchases the jacket for $3
    12·1 answer
  • In a 30-60-90 right triangle, the side opposite the 30- degree angle is?
    9·2 answers
  • Plzzzzz helpp j + 9 - 3 &lt; 8
    10·1 answer
  • The histogram displays how many students are in each classroom during homeroom. What percentage of classrooms have 25 students o
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!