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kotykmax [81]
4 years ago
10

A 1000 kg car travels on a highway with a speed of 30 m/s. The driver sees a roadblock and applies the brakes, which provide a

Physics
1 answer:
Tomtit [17]4 years ago
7 0

Answer:

-4m/s

Explanation:

use the formula

f = ma

where f-force

m-mass

a-accleration

so

1kN=1000N

so apply

4000=1000×a

a=4m/s

(the negative is because the car was braking)

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what is the resistance of a car light bulb that conducts 0.025A current when connected to a 12V car accumulator? is the current
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One form of Ohm's Law says . . . . . Resistance = Voltage / Current .

R = V / I

R = (12 v) / (0.025 A)

R = (12 / 0.025) (V/I)

<em>R = 480 Ohms</em>

I don't know if the current in the bulb is steady, because I don't know what a car's "accumulator" is.  (Floogle isn't sure either.)

If you're referring to the car's battery, then the current is quite steady, because the battery is a purely DC storage container.

If you're referring to the car's "alternator" ... the thing that generates electrical energy in a car to keep the battery charged ... then the current is pulsating DC, because that's the form of the alternator's output.  

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3 years ago
Which change would cause the largest increase in a mountain climber’s gravitational potential energy?
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<span>carrying twice the weight and climbing twice as high</span>
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The gravitational force between two objects is 1600 N. What will be the gravitational force between the objects if the distance
Luden [163]
The gravitational force is inversely proportional to squared distance.
This means when the distance between the objects is increased, the gravitational force reduces. 

1600 = k/d². where k is constant.
k=1600d²

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4 0
3 years ago
The concentration of carbon monoxide in an urban apartment is 48 μg/m3. What mass of carbon monoxide in grams is present in a r
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Answer:

The answer is 3213.6 grams.

Explanation:

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4 years ago
1. Identify the significance of the following terms to the subject of the Civil War.
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