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rewona [7]
3 years ago
11

Using the “On the Highway” distance time graph, what is the average velocity of the car? (use slope = rise/ run OR v = d/t)

Physics
1 answer:
julsineya [31]3 years ago
8 0

Reading the graph, you get 300 km in 4 hours.

Givens

  • d = 300 km
  • t = 4 hours

Formula

v = d/t

Solution

v = 300/4 = 75 km/hour which is the slope.

Comment

Any point that you can read accurately will give you the same answer. Since the point are not that readable, you can estimate one of them

Try

t = 6 hours

d = 450 km An estimate. It looks to be 1/2 way between 400 and 500 km when t = 6 hours.

v = ??

v = 450/6

v = 75 miles / hour  << Answer

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How much time will it take to perform 440 joule of work at a rare of 11 w?​
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Answer:

40sec

Explanation:

Data

Work = 440 J

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time = ?

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2 years ago
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Explanation:

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3 years ago
An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed. What is t
xeze [42]

Answer:

The magnitude of the tension in he string is equal to the magnitude of the weight of the object.

Explanation:

According to the Newton's 1st law, An object will remain at rest or in uniform motion in a straight line unless acted upon by an unbalanced force.

In here, the elevator is moving with a constant speed. So the object must have the equal constant speed. Which means, it has a uniform motion. According to Newton's 1st law, the total unbalanced force on the object must be zero . As we know, there are only two forces are on the object and they are,

The tension in string(T)   ,   The weight of the object(W) .

                                  ∴ F    =   0

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So to balanced those forces, the magnitude of the tension in the string must be equal to the magnitude of the weight of  the object.  

       

8 0
3 years ago
Dylan has two cubes of iron. The larger cube has twice the mass of the smaller cube. He measures the smaller cube. Its mass is 2
liubo4ka [24]

Answer:

The volume of the larger cube is 5.08 g/cm³.

Explanation:

Given that,

Mass of smaller cube = 20 g

Density of smaller cube \rho= 7.87 g/cm^2

Dylan has two cubes of iron.

The larger cube has twice the mass of the smaller cube.

M_{l}=2m_{s}

Density is same for both cubes because both cubes are same material.

The density is equal to the mass divided by the volume.

\rho=\dfrac{m}{V}

V=\dfrac{m}{\rho}

Where, V = volume

m = mass

\rho=density

We need to calculate the volume of smaller mass

The volume of smaller mass

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V_{s}=\dfrac{20}{7.87}

V_{s}=2.54\ cm^3

Now, We need to calculate the volume of large cube

V_{l}=\dfrac{m_{l}}{\rho_{l}}

V_{l}=\dfrac{2\times20}{7.87}

V_{l}=5.08\ g/cm^3

Hence, The volume of the larger cube is 5.08 g/cm³.

8 0
3 years ago
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