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
iren [92.7K]
3 years ago
8

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional

questions.
Online Content: Site 1
Your Body’s Levers
When you think of a lever, you may picture a seesaw structure or a handle, but did you know that you have levers in your body, too? A lever is just something bar shaped that rotates about a fulcrum, which acts as the axis of rotation. A lever acts as a force, which increases velocity and thus acceleration in the direction it is applied. Resistance acts in opposition to the effects of an object’s energy.

The Three Classes of Levers in Your Body and around You
First Class
For this class of lever, the motive force (the applied exertion of effort) and resistive force (force opposing this exertion) are on either side of the fulcrum, which is right in the middle. Tools such as scissors and seesaws are examples of this type of lever. When you flex your muscles, agonistic and antagonistic muscle groups act as the force and resistance, respectively. In your arm, your elbow is the axis of rotation. The axis being midway between the force and the resistance results in greater speed, force, and range of motion.

Second Class
Second class levers have resistance between the axis and the applied force. When you use a nutcracker or wheelbarrow, you are using a second class lever. An example of a second class lever in your body is your foot when you stand up on your toes. The balls of your feet are the axes in this case. Your ankle plantar flexors act as a force against the resistance of the body at tibial articulation. Second class levers result in smoother movements because of less inertia, as well as less force.

Third Class
In third class levers, the force is between the axis and resistance. One example is a person positioning their hands on the middle (force) and the end (axis) of the oar through the water (resistance). The knee acts as a third class lever when your hamstring contracts (force) and your lower leg flexes as a result (resistance). Third class levers lead to higher levels of inertia, meaning they are harder to stop.

As you may have noticed, the relative positions of the axis, exerted force, and resistant force have an impact on factors such as inertia and how smoothly movement occurs. The classes of levers provide different combinations of important mechanisms, each of which is important for a different class of tasks.

Examples of First, Second, and Third Class Levers. First Class, the Fulcrum is below and in the middle of Effort and Load which are above. Second Class, the Load is on top in the middle of Effort and the Fulcrum which is at the right. Third Class, Load is on top at the right, Effort is below in the middle, and the Fulcrum is below to the left.

Describe each class of lever and explain the characteristics of each. (Site 1)
Health
1 answer:
Aleks [24]3 years ago
7 0

Answer:

Duke is a great place to work for lower wages and more to the higher level of the topic Nepal diversities Nepal identities by the way back to the states and the world of the topic of the topic

You might be interested in
HELP PLS ASAP
Studentka2010 [4]

Answer:

The impact of disease can be minimized by administering recommended vaccinations to pregnant women.

Explanation:

7 0
1 year ago
Hamlin has a heart problem. He has questions about his treatment, which consists of better diet and exercise. Which group of car
nadezda [96]
I would say Push up's for your answer because of balance.
7 0
3 years ago
Read 2 more answers
The study how the body uses food?
Anna007 [38]
Sorry babe i don't get your question if your question is "how does the body use food" then your answer is this (when you eat, your body breaks down all of the starches, sugars, fats, etc. from food that you eat, and uses that from the food you just ate for ENERGY so you can stay alive) so long story short your body uses food for ENERGY....but if that wasn't your question then i'm sorry i don't know
6 0
3 years ago
Read 2 more answers
How to stop running stomach
Ksivusya [100]
If you want to stop it without using any medication, the best way to do it is by drinking warm herbal liquid like the mixture of warm tea and a little bit of honey or the mixture of warm water with a little bit of salt

If you want to stop it using medication, it's probably best to use the one that contained pepto-bismol or simethicone 


3 0
3 years ago
Which are examples of common male reproductive issues? Select all that 2 points
blsea [12.9K]

Answer: I honestly don’t know but if I do this I get an extra 50 free answers sooo ya

Explanation:

6 0
3 years ago
Other questions:
  • The habitual manner in which people explain the things that happen to them is their explanatory style.
    8·2 answers
  • Which of these most directly impacts a person's physical health?
    14·2 answers
  • ___________ refers to interventions targeting individuals who are not yet experiencing symptoms of a disorder. A.Indirect assess
    11·1 answer
  • A 3-week-old infant is diagnosed with pertussis. which antimicrobial agent would the nurse expect the physician to prescribe?
    10·1 answer
  • He main reason Tommy might use static stretching is _____.
    14·1 answer
  • Is it strange that im not circumcised???
    11·2 answers
  • PLEASE HELP<br> List five of the muscles in the body.
    15·1 answer
  • Emily is two. She has always loved to go see her grandma. Today when her mother says, "Put your coat on. It is time to go see Gr
    14·2 answers
  • If truth was better than lies, why do we constantly lie.
    5·2 answers
  • <img src="https://tex.z-dn.net/?f=give%20%5C%3A%20some%20%5C%3A%20example%20%5C%3A%20of%20%5C%3A%20adverb%20%5C%3A%20%5C%3A%20"
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!