All categories

4 years ago

Mechanical advantage describe how simple machines?

Physics

2 answers:

7nadin3 [17]4 years ago

6 0

Answer:C: multiply the input force

Explanation:

A lever is a simple machine consisting of a bar pivoted or supported at a point (known as Fulcrum) about which it can rotate to perform the task.

Mechanical Advantage MA = $\frac{E}{L}=\frac{F_{L}}{F_{E}}$

where E→ length of effort arm from the pivot

L→ length of load arm from the pivot

$F_{E}$ → force on the end of effort arm

$F_{L}$ → force on the end of load arm

<u>By the law of conservation of angular momentum:-</u>

$F_{E}\times E$ = $F_{L}\times L$

sineoko [7]4 years ago

4 0

answer would be C. multiply the input force.

You might be interested in

Which image shows the correct way of lining up vectors to add them together? A. two arrows lined up facing away from each anothe

Morgarella [4.7K]

The image shows the correct way of lining up vectors to add them together, that the two arrows lined up one after the other, therefore the correct answer is option B.

<h3>What is a vector quantity?</h3>

The quantities that contain the magnitude of the quantities along with the direction are known as the vector quantities.

Examples of vector quantities are displacement, velocity acceleration, force, etc.

Thus, the image shows the correct way of lining up vectors to add them together, that the two arrows lined up one after the other, therefore the correct answer is option B.

Learn more about the vector quantity here , refer to the link given below ;

brainly.com/question/15516363

#SPJ1

8 0

1 year ago

Assume that the average mass of each of the approximately 1 billion people in China is 55 kg.Assume that they all gather in one

Harman [31]

Answer: $5.9(10)^{-8} m$

Explanation:

The equation to calculate the center of mass $C_{M}$ of a particle system is:

$C_{M}=\frac{m_{1}r_{1}+m_{1}r_{1}+...+m_{n}r_{n}}{m_{1}+m_{2}+...+m_{n}}$

In this case we can arrange for one dimension, assuming the geometric center of the Earth and the ladder are on a line, and assuming original center of mass located at the Earth's geometric center:

$C_{M}=\frac{m_{E}(0 m) + m_{p} r_{E-p}}{m_{E}+m_{p}}$

Where:

$m_{E}=5.9(10)^{24} kg$ is the mass of the Earth

$m_{p}=55(10)^{9} kg$ is the mass of 1 billion people

$r_{E}=6371000 m$ is the radius of the Earth

$r_{E-p}=6371000 m- 2m=6370998 m$ is the distance between the center of the Earth and the position of the people (2 m above the Earth's surface)

$C_{M}=\frac{m_{p}55(10)^{9} kg (6370998 m)}{5.9(10)^{24} kg+55(10)^{9} kg}$

$C_{M}=5.9(10)^{-8} m$ This is the displacement of Earth's center of mass from the original center.

8 0

3 years ago

If a car moves with constant velocity, does it also move with a constant speed?

GarryVolchara [31]

Answer:

Yes. The fact that an object moves at constant velocity implies that its speed is also constant. Note that the converse statement isn't necessarily true.

Explanation:

Velocity is a vector. For two vectors to be equal to each other,

their magnitudes (sizes) need be the same, and
they need to point in the same direction.

In motions, the magnitude of an object's velocity is the same as its speed.

If the car moves with a constant velocity, that means that

the magnitude of its velocity, the speed of the car, is constant;
also, the direction of the car's motion is also constant.

In other words,

$\text{Velocity } \vec{v}\text{ is constant} \implies \text{Speed }v\text{ is constant}$ .

Note that the arrow here points only from the velocity side to the speed side. It doesn't point backward because knowing that the speed of an object is constant won't be sufficient to prove that the velocity of the object is also constant. For example, for an object in a uniform circular motion, the speed is constant but the direction keeps changing. Hence the velocity isn't constant.

3 0

3 years ago

Un cuerpo de 60 kg se encuentra a una distancia de 3.5 m del otro cuerpo, de manera que entre ellos se produce una fuerza de 6.5

aev [14]

Answer:

1989.6Kg

Explanation:

The computation of the mass of the other body is given below:

As we know that

F = G × m1 × m2 ÷ r²

Here the G would have the constant value i.e. 6.67 × 10^-11Nm² / kg².

Now

6.5 × 10^-7N = 6.67 × 10^-11Nm² / kg² × 60Kg × m2 / (3.5m) ²

m2 = (F × r²) / (G × m1)

m2 = (6.5 × 10^-7N × (3.5m) ²) ÷ (6.67 × 10^-11Nm² / kg² × 60Kg)

= 1989.6Kg

7 0

3 years ago

This reddish layer of the atmosphere of the Sun is not normally visible, but the ________________ may be seen briefly during a t

kupik [55]

Answer:

Chromosphere

Explanation:

The Chromosphere is one of the important internal layers of the sun, which lies above the layer of Photosphere. The Chromosphere has a thickness of about 3 to 5 km having a very high temperature, ranging from about 5000 to 20,000°C. Due to this extreme temperature and continuous nuclear fusion process that takes place at the core of the sun, there forms the reddish colored layer, which is usually not visible but can be observed during the time of a total solar eclipse, by the use of an ultraviolet telescope.

8 0

3 years ago