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3 years ago

What does a mechanical advantage less then one mean? What is gained?

1 answer:

7 0

A mechanical advantage less than ' 1 ' means the output force is less than the input
force. But distance is gained ... the load moves farther than the driving force moves.

An example of all this is a big father and his little 4-year-old daughter playing
on the see-saw in the park. He adjusts the board so that he's much closer
to the pivot than she is, and that way, their weights can balance each other.

It's set up so that the mechanical advantage from him to her is less than ' 1 '.
Now, look at what happens when Dad sits down on his end of the see-saw,
and pushes it down with his 180 pounds of force. At the other end, the board
is barely lifting her with a force of just 30 pounds. BUT ... as he sinks down
only 1 foot against his end of the board, her end rises 6 feet off the ground.

You might be interested in

A ray of light strikes a mirror. The angle formed between the incident ray and the reflected ray measures 64 º. What are the mea

julia-pushkina [17]

Answer:

Draw line perpendicular to mirror

Angle of incidence = angle between incident ray and perpendicular

Angle of reflection = angle between reflected ray and perpendicular

32 + 32 = 64

Angle of incidence = angle of reflection = 32 deg

6 0

2 years ago

A certain car is capable of accelerating at a uniform rate of 0.85 m/s^2. What is the magnitude of the car's displacement as it

gogolik [260]

Solution: 85.11 m

Given:

acceleration of the car, $a= 0.85 m/s^{2}$

initial velocity, $u=83km/h=23.05 m/s$

final velocity, $v=94 km/h=26.11 m/s$

we need to find the displacement (s) of the car.

we would use the equation of motion:

$2as=v^{2}-u^{2}\\
\Rightarrow s=\frac{v^{2}-u^{2}}{2a} \\
\Rightarrow s=\frac{26.11^{2}-23.05^{2}}{2\times0.85}\\
\Rightarrow s=85.11 m$

hence, the displacement done by the car is = 85.11 m

7 0

3 years ago

A device that transforms electrical energy to mechanical energy is a

yarga [219]

Answer:

Electric Motor

Explanation:

There are mainly two types of machines for inter-conversion between mechanical energy and electrical energy as under:

Motor
Generator

Motor is a device which converts electrical energy into a mechanical whereas generator does the exact opposite of motor.

There are 2 types of motors:

AC Motor - Converts alternating current into mechanical energy

DC Motor - Converts direct current into mechanical energy

4 0

4 years ago

An airplane is traveling at a fixed altitude with an outside wind factor. The airplane is headed N 40° W at a speed of 600 miles

bija089 [108]

Answer: $\vec{v_R}=\hat{i}[-329.11]+\hat{j}[516.18]$

Explanation:

Given

Plane is initially flying with velocity of magnitude $v=600\ mph$

at angle of $40^{\circ}$ with North towards west

Velocity of plane airplane can be written as

$v_a=600(-\sin 40\hat{i}+\cos 40\hat{j})$

Now wind is encountered with speed of $v=80\ mph$ at angle of $N45^{\circ}E$

$v_w=80(\cos 45\hat{i}+\sin 45\hat{j})$

resultant velocity

$\vec{v_R}=\vec{v_a} +\vec{v_w}$

$\vec{v_R}=600(-\sin 40\hat{i}+\cos 40\hat{j})+ 80(\cos 45\hat{i}+\sin 45\hat{j})$

$\vec{v_R}=\hat{i}[-385.67+56.56]+\hat{j}[459.62+56.56]$

$\vec{v_R}=\hat{i}[-329.11]+\hat{j}[516.18]$

for direction $\tan \theta =\frac{516.18}{329.11}$

$\tan \theta =1.568$

$\theta =57.47^{\circ}$ west of North

3 0

4 years ago

What is the Scientific definition of friction?

seropon [69]

Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
Hope this is of great help to you, and happy studying~!
~Mistermistyeyed.

8 0

4 years ago

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