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
Dmitry [639]
3 years ago
14

A scaffold of mass 60 kg and length 5.0 m is supported in a horizontal position by a vertical cable at each end. Its center of g

ravity is at the middle of the scaffold. A window washer of mass 80 kg stands at a point 1.5 m from one end. What is the tension in (a) the nearer cable and (b) the farther cable

Physics
1 answer:
lapo4ka [179]3 years ago
3 0

Answer:

a) 842.8 N

b) 529.2 N

Explanation:

Given

Mass of scaffold, m = 60 kg

Length of scaffold, l = 5 m

Mass of window washer, m(w) = 80 kg

Distance of the window washer, d = 1.5 m

From the attached image

a = 1.5 m

b = 2.5 m

c = 5 m

W = 60 * 9.8 = 588 N

W(w) = 80 * 9.8 = 784 N

Since the scaffold is in equilibrium, then

Στ(b) = 0

W * (c - b) + W(w) * (c - a) - Lc = 0

Lc = W * (c - b) + W(w) * (c - a)

L = [W * (c - b) + W(w) * (c - a)] / c

L = [588 * (5 - 2.5) + 784 * (5 - 1.5)] / 5

L = (588 * 2.5 + 784 * 3.5) / 5

L = (1470 + 2744) / 5

L = 4214 / 5

L = 842.8 N

Στ(a) = 0

Rc - W * b - W(w) * a = 0

R = [W * b + W(w) * a] / c

R = (588 * 2.5 + 784 * 1.5) / 5

R = (1470 + 1176) / 5

R = 2646 / 5

R = 529.2 N

You might be interested in
Adding powdered Gatorade to water makes a tasty solution. What is the solvent in this example? A) water B) salt and sugar C) Gat
oksano4ka [1.4K]

Answer: The correct answer is A.

Explanation: In a solution, the substance which is in larger proportion is called as a solvent and the substance which is in smaller proportion is called as a solute.

When we mix a powdered Gatorade in the water, the Gatorade is present smaller proportion and hence will be considered as a solute in a solution and water is present in larger proportion and will be considered as solvent in a solution.

Hence, the correct option is A.

6 0
3 years ago
Two children are pulling on opposite sides of a blanket. The brother is pulling with a force of 3 N. The sister is pulling with
Citrus2011 [14]
Let F1=Force exerted by the brother (+F1)
F1= Force exerted by the sister (-F2)

Fnet=(+F1) + (-F2)
Fnet= (+F1) + (-F2)
Fnet=F1 - F2
Fnet= (+3N)+(-5N)
Fnet= -2N

-F

towards the sister (-F) (greater force applied)
7 0
3 years ago
At what point in its motion is the KE of a pendulum bob a maximum? 1. The KE does not change. 2. at the lowest point 3. at the h
Andrew [12]

Answer:

2. at the lowest point

Explanation:

The motion of the pendulum is a continuous conversion between kinetic energy (KE) and gravitational potential energy (GPE). This is because the mechanical energy of the pendulum, which is sum of KE and GPE, is constant:

E = KE + GPE = const.

Therefore, when KE is maximum, GPE is minimum, and viceversa.

So, the point of the motion where the KE is maximum is where the GPE is minimum: and since the GPE is directly proportional to the heigth of the bob:

GPE=mgh

we see that GPE is minimum when the bob is at the lowest point,so the correct answer is

2. at the lowest point

3 0
3 years ago
Individuals with favorable traits are ________ in an environment
77julia77 [94]
Succesful is correct.
6 0
3 years ago
4. On the way to the castle, Shrek and Donkey have to walk on a rickety bridge<br>over​
salantis [7]
Over lava!
I’m pretty sure that’s the answer cuz I haven’t seen the movie in a hot minute!

-YOUR WELCOME!! <3
8 0
3 years ago
Read 2 more answers
Other questions:
  • A driver travels 135 km, east in 1.5 h, stops for 45 minutes for lunch, and then resumes driving for the next 2.0 h through a di
    12·1 answer
  • Quando e como surgiu a ginastica rítmica no mundo e no Brasil?
    13·1 answer
  • The ideal mechanical advantage of an inclined plane is 3.5, and its efficiency is 0.6. What is the mechanical advantage of the i
    7·1 answer
  • Assume that the surface temperature of the lightbulb filament when it is plugged into an outlet of 120 V is about 3000 K and the
    14·2 answers
  • 7. Two children of mass 20 kg and 30 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If th
    12·1 answer
  • Why does the frequency change and wavelength not change in an instrument?
    8·1 answer
  • What provides the force on the person in the passenger seat?
    14·1 answer
  • A. If an electron of 16 eV had a head-on collision with a Cs atom at rest, what would be the kinetic energy in eV) of the recoil
    15·1 answer
  • PLEASE HELP ME WITH THIS ONE QUESTION
    14·1 answer
  • A child and sled with a combined mass of 54.8
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!