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
Natalka [10]
3 years ago
14

A 70 kg man's arm, including the hand, can be modeled as BIO 75-cm-long uniform rod with a mass of 3.5 kg. When the man raises b

oth his arms, from hanging down to straight up, by how much does he raise his center of mass?
Physics
1 answer:
Butoxors [25]3 years ago
7 0

Answer:

  Δy = 7.1 cm

Explanation:

The center of mass of a body is defined

            y_{cm} = 1 /M ∑m_{i}  y_{i}i

Where M is the total mass of the body, m mass of each part and ‘y’ height

Let's apply this equation to our case

We locate the reference system on the shoulders

The height of the arms is at its midpoint

            y = -75/2 = 37.5 cm

With arms down

            y_{cm} = 1/70 (63 y₀ - 3.5 37.5 - 3.5 37.5)

            y_{cm} = 1/70 (63 y)₀ - 7 37.5)

With arms up

          y_{cm}’= 1/70 (63 y₀ + 3.5 y + 3.5 y)

          y_{cm}’= 1/70 (63y₀ + 7 35.5)

let's subtract the two equations

        y_{cm}’ - y_{cm} = 1/70 2 (7 35.5)

         Δy = y_{cm}’ - y_{cm} = 2 7 35.5 / 70

         ΔY = 7.1 cm

You might be interested in
an object weighing 15 newtons is lifted from the ground to a height of 0.22 meter what is the increase in the object's gravitati
kicyunya [14]
GPE= weight•height= 15 N• 0.22meter= 3.3 Joules
I hope this helps ~~Charlotte~~
5 0
3 years ago
Read 2 more answers
Which device is used to measure interior diameter of a water pipe and in which units are the callibrations​
ahrayia [7]

We can use a vernier calliper

3 0
3 years ago
Read 2 more answers
According to the barometer in the attachment below, which statement is true?
mixer [17]

Your answer is A

Pls mark me brainiest and I sure hope this helps you

8 0
2 years ago
Read 2 more answers
What is the difference between collinear and coplanar
DIA [1.3K]

Answer:

Collinear is when points are in the same straight line but coplanar is when points are all on the same plane.

4 0
3 years ago
How would a chart of mid-17th century religious beliefs differ from this chart?
tino4ka555 [31]

Answer:

The correct answer is B)  Fewer people would identify as an atheist because people were not willing to share alternative religious beliefs publically.

Explanation:

A chart of mid-17th-century religious beliefs differs from this chart in that Fewer people would identify as an atheist because people were not willing to share alternative religious beliefs publically.

In the 1600s, people did not have total freedom of speech if they had any. The church had a tremendous influence in the life of people and religious beliefs defined societies and families. The Church exerted its power and influence in many aspects of the people's lives and something out of the purview of the church or different to the religious beliefs of the Church was considered to be sacrilegious. The Church prosecuted people for being against the Church, so people of that time preferred to say that they were religious people supporting the church. Being an atheist was not really an option in the 17th century.

<u><em>Hope this helps!!</em></u>

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement would be the best evidence that heat transfer through radiation has occurred and why? A) A pan gets hot on a sto
    10·2 answers
  • All matter in the Universe consists of many substances called elements. <br><br> true or faluse
    14·2 answers
  • Katy works at a pet store, and is in charge of tracking the cat food supply for the morning, afternoon, and evening shifts. Ther
    8·2 answers
  • If F1 is the magnitude of the force exerted
    7·1 answer
  • A horizontal pole is attached to the side of a building. There is a pivot P at the wall and a chain is connected from the end of
    5·1 answer
  • Does coefficient of thermal expansion vary with temperature?
    15·1 answer
  • What is fundamental quantity?​
    11·2 answers
  • SORRY LAST ONE FOR TODAY, IM GOING TO PASS IF I GET THIS ANSWERED
    9·2 answers
  • The kinetic and potential energies of an object both always depend on which property?.
    8·1 answer
  • The figure in Figure 1 shows two single-slit diffraction patterns. The distance between the slit and the viewing screen is the s
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!