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Illusion [34]
3 years ago
8

Destiny is eating lunch at her favorite cafe when her friend Jada calls and says she wants to meet her. Jada is calling from a c

ity 45 miles away and wants to meet Destiny somewhere between the two locations. Jada says she will start driving right away, but Destiny needs 10 min to finish her lunch before she can begin driving. Jada plans to drive at 55 mph, whereas Destiny usually averages about 70 mph. Ignore acceleration and assume the highway is a straight line.
Required:
a. How many minutes from will Jada be driving before she meets Destiny?
b. How many miles d will Destiny have traveled when they meet?
Physics
1 answer:
NeTakaya3 years ago
5 0

Answer:

Explanation:

Let time taken by Jada in driving be t hour .

distance travelled by jada = 55 t

a )

Time of drive by destiny = t - 10 min

= t - .167 hour

distance of travel by destiny = 70 ( t - .167 )

Total distance = 45 miles

55 t + 70 ( t - .167 ) = 45

55t + 70 t - 11.69 = 45

125 t = 56.69

t = .453 hour = 27.21 minutes

b )

distance travelled by Destiny = 70 ( t - .167 )

70 ( .453 - .167 )

= 20.02 miles .

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Answer:

4 smaller disks

Explanation:

We are given;

Mass of smaller and larger disks = M

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Thus;

For small disk, I_small = ½MR²

For large disk, I_large = ½M(2R)² = 2MR²

We are told that moment of inertia of System A consists of two of the larger disks. Thus;

I_A = 2 × I_large = 2 × 2MR²

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We are also told that System B consists of one of the larger disks and a number of the smaller disks. Thus;

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Where n is the number of smaller disks.

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We are told that the moment of inertia for system A equals the moment of inertia for system B. Thus;

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4MR² = MR²(2 + n/2)

MR² will cancel out to give;

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The downward force on the 2. 67-cm piston that is required to lift a mass of 2000 kg supported by the 20-cm piston is 350 N.

<h3>What is pascal law?</h3>

Pressure applied to a closed system of fluid will be transfer at each point of the fluid and the boundaries of the system.

Let suppose at the two point of such system the input force apllied is F₁ and output force we get is F₂. The area of this points is A₁ and A₂ respectively. As the pressure at both point is same. Then by the pascal law,

\dfrac{F_1}{A_1}=\dfrac{F_2}{A_2}\\

In case of radius,

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Thus, the downward force on the 2. 67-cm piston that is required to lift a mass of 2000 kg supported by the 20-cm piston is 350 N.

Learn more about the pascal law here;

brainly.com/question/4262025

#SPJ4

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Explanation:

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