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4 years ago

What does mechanical advantage describe regarding simple machines?

Physics

2 answers:

raketka [301]4 years ago

8 0

Answer:

they are manufactured

miss Akunina [59]4 years ago

8 0

Answer:

They multiply the input force.

Explanation:

Mechanical Advantage is the multiplication of the input force to give an increased output by a simple machine due to the difference in the length of load arm and the effort arm.

It is based upon the law of conservation of moments as to force applied at the farther point from a hinge or a pivot needs to be balanced by a greater force counteracting at a shorter distance from the pivot.

Lever is a simple machine which consists of a bar pivoted or supported at a point (called fulcrum) about which it can rotate.

$MA=\frac{F_L}{F_E}= \frac{E}{L}$ ..............................................(1)

where:

$F_E=$ force applied on the end of effort arm

$F_L=$ force due to load on the end of load arm

L = length of load arm

E = length of effort arm

Equation (1) is known as the law of levers, it was proven by Archimedes using geometric reasoning.

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If a person walks 3 m north and 5 meters east, how would you find the displacement for that person? what would the displacement

UkoKoshka [18]

Answer:

AC)=(AB)2+(BC)2−−−−−−−−−−−−√=42+32−−−−−−√

⇒displacement=16+9−−−−−√=25−−√=5m

8 0

3 years ago

A large vessel of the diameter of 14 mm divides into two identical smaller vessels but the velocity of blood in

ycow [4]

Answer:

the diameter of the smaller vessels is 9.90 mm

Explanation:

The computation of the diameter of the smaller vessels is given below;

Given that

The larger vessel of the diameter is 14mm

So,

d1 = 7 mm

let us assume the diameter of the smaller artery is d2

Now we used the equation of continuity i.e.

v × pi × d1^2 = 2 × v × pi × d2^2

14^2 = 2 × d2^2

d2 = 9.90 mm

Hence, the diameter of the smaller vessels is 9.90 mm

5 0

3 years ago

One small speaker is placed 3m to the east of a second speaker, and a listener stands 4m directly south of one of the speakers.

alexandr402 [8]

Answer:

The value is $\lambda = 2 \ m$

Explanation:

From the question we are told that

The distance of the speaker from the second speaker to the east is $d = 3 \ m$

The distance of the speaker from the listener to the south is $a = 4 \ m$

Generally given that if the speaker move in any direction, their sound become louder , it then mean that the position of the listener of minimum sound (i.e a position of minima ) ,

Generally the path difference of the sound produce by both speaker at a position of minima is mathematically represented as

$y = \frac{\lambda}{2}$

Generally considering the orientation of the speakers and applying Pythagoras theorem we see that distance from the second speaker to the listener is mathematically represented as

$b = \sqrt{d^ 2 + a^2 }$