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Andre45 [30]
3 years ago
6

Driving to work one morning, you get a flat tire. When using the car jack, you apply 120N of force to the jack and the jack in t

urn applies 2000N of force to lift the car up. What is the mechanical advantage of the jack?
Physics
1 answer:
Anna007 [38]3 years ago
3 0

Answer:

16.7

Explanation:

Mechanical advantage is the ratio of the output force to the input force.

MA = Fout / Fin

MA = 2000 N / 120 N

MA ≈ 16.7

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Answer:

Explanation:

El 15 de febrero de 1564 nacía Galileo Galilei (1564-1642). Galileo Galilei es una de las figuras claves de la historia de la Ciencia, pudiéndosele considerar el primero que aplicó el método científico experimental-matemático.

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3 years ago
Suppose a wheel with a tire mounted on it is rotating at the constant rate of 3.37 times a second. A tack is stuck in the tire a
zhannawk [14.2K]

Answer:

The tangential speed of the tack is 8.19 m/s.

Explanation:

The wheel rotates 3.37 times a second that means wheel complete 3.37 revolutions in a second. Therefore, the angular speed ω of the wheel is given as follows:

\omega =3.37rev/s \times(\frac{2\pi rad}{1s} )\\\\=21.174rad/s

Use the relation of angular speed with tangential speed to find the tangential speed of the tack.

The tangential speed v of the tack is given by following expression

v = ω r

Here, r is the distance to the tack from axis of rotation.

Substitute 21.174 rad/s for ω, and 0.387 m for r in the above equation to solve for v.

v = 21.174 × 0.387

v = 8.19m/s

Thus, The tangential speed of the tack is 8.19 m/s.

4 0
3 years ago
Read 2 more answers
A cat with a mass of 5.00 kg pushes on a 25.0 kg desk with a force of 50.0N to jump off. What is the force on the desk?
olya-2409 [2.1K]

Answer:

First of all the formula is F= uR,( force= static friction× reaction)

mass= 5+25=30

F= 50

R= mg(30×10)=300

u= ?

F=UR

u= F/R

u= 50/300=0.17N

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Answer:

When there is nearsightedness or myopia

Explanation:

As, in myopia the image is formed in front of the retina.

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So concave lens makes things look bigger, so therefore, it is used during myopia, to make things look bigger when they are far away

3 0
3 years ago
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