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

By the law of conservation of angular momentum:-

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

sineoko [7]4 years ago

4 0

answer would be C. multiply the input force.

You might be interested in

What are (a) the lowest frequency, (b) the second lowest frequency, and (c) the third lowest frequency for standing waves on a w

Tatiana [17]

Answer:

$a. \ f_1=7.9057Hz\\\\b. \ f_2=15.8114Hz\\\\c. \ f_3=23.7171Hz$

Explanation:

a. The wire's length is 10m long and has a mass 100g and a tension of 250N.

Frequency is given by the equation:

$f=\frac{nv}{2L}\\\\=\frac{n}{2L}\sqrt{\frac{t}{\mu}$ #where t=250N*10=2500N, $\mu=0.1kg$

#substitute for actual values for the lowest frequency.

$F=\frac{n}{2\times 10m}\times \sqrt{2500N/0.1kg}\\=\frac{1}{2\times 10m}\times \sqrt{2500N/0.1kg}\\=7.9057Hz$ #n=1, lowest frequency

Hence, the lowest frequency for standing waves is 7.9057Hz

b.The wire's length is 10m long and has a mass 100g and a tension of 250N.

Frequency is given by the equation:

$f=\frac{nv}{2L}\\\\=\frac{n}{2L}\sqrt{\frac{t}{\mu}$ #where t=250N*10=2500N, $\mu=0.1kg$

#The second lowest frequency happens at $n=2$ :

$F=\frac{n}{2\times 10m}\times \sqrt{2500N/0.1kg}\\=\frac{2}{2\times 10m}\times \sqrt{2500N/0.1kg}\\=15.8114Hz$

Hence, the second lowest frequency is 15.8114Hz

c.Given that the wire's length is 10m long and has a mass 100g and a tension of 250N.

Frequency is given by the equation:

$f=\frac{nv}{2L}\\\\=\frac{n}{2L}\sqrt{\frac{t}{\mu}$ #where t=250N*10=2500N, $\mu=0.1kg$

The third lowest frequency happens at $n=3$

$F=\frac{n}{2\times 10m}\times \sqrt{2500N/0.1kg}\\=\frac{3}{2\times 10m}\times \sqrt{2500N/0.1kg}\\=23.7171Hz$

Hence, the third lowest frequency is 23.7171Hz

6 0

3 years ago

What two forces are there when you skydive

dusya [7]

Gravity is pulling you down and friction is slowing you down so you don't plummet to the ground at super high speeds.

7 0

4 years ago

Read 2 more answers

What total distance will a sound wave travel in air in 3.00 seconds at stp?

dimaraw [331]

At stp conditions ( $T=0^{\circ}C$ ), the speed of sound is
$v=331.2 m/s$
The sound wave moves by uniform motion, so we can use the basic relationship between space, time and velocity:
$S=vt$
where S is the distance covered by the sound wave in a time t. In our problem, t=3.00 s, therefore the distance covered by the sound wave is
$S=vt=(331.2 m/s)(3.00 s)=993.6 m$

4 0

3 years ago

How do inertia and centripetal force combine to keep an object moving in circular motion?

katen-ka-za [31]

As the centripetal force acts upon an object moving in a circle at constant speed, the force always acts inward as the velocity of the object is directed tangent to the circle. ... In fact, whenever the unbalanced centripetal force acts perpendicular to the direction of motion, the speed of the object will remain constant.

6 0

3 years ago

Read 2 more answers

_____ contains chemical energy. A. Heat B. Light C. Natural gas

FinnZ [79.3K]

The answer is C. Natural gas because both A and B are their own forms of energy.

5 0

3 years ago

Read 2 more answers