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s344n2d4d5 [400]
3 years ago
15

An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an

automobile of mass 890 kg traveling initially at a speed of 48.0 km/h in a distance equal to the diameter of a dime, which is 1.8 cm ?
Physics
1 answer:
Luba_88 [7]3 years ago
4 0

Answer:

F = 4399 KN

Explanation:

given,

mass of automobile = 890 kg

initial speed = 48 km/h

                     = 48 × 0.278 = 13.34 m/s

using equation of motion

v² = u² + 2 a × s

0 = 13.34² - 2 a ×0.018

a = \dfrac{13.34^2}{0.036}

a = 4943.21 m/s²

F   = m × a

F   = 890 × 4943.21

F   =  4399456.9 N

F = 4399 KN

hence, the  Net force is F = 4399 KN

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Answer:

Taking it was dropped with inital velocity of 0m/s.

v = u+at

v = 0 + 9.8*1.5

v = 14.7s

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Explanation:

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An object has a mass of 20 kg and is placed 2 m above the ground. What is its gravitational potential energy? (PEg)
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Answer:

<h2>392 J</h2>

Explanation:

The potential energy of a body can be found by using the formula

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where

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h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

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We have the final answer as

<h3>392 J</h3>

Hope this helps you

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2 years ago
A group of students conduct an experiment with a block of wood sliding down an incline. They find that the final energy of the b
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Answer:

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2) Some energy was transformed to other forms. (This question)

3) 3.24 J

4) 45 J

5) 1020 J

Explanation:

100%

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Which type of cloud would you expect to be involved in some form of precipitation?
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13) The condenser pressure is 417.4 psig for r-410A and the condenser outlet temperature is 108f. how much subcooling is there i
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Answer:

12°F

Explanation:

Calculation for how much subcooling is there in the condenser

Since the CONDENSING TEMPERATURE for 417.4 psig discharge pressure is 120 degrees (120°) which means that the amount of subcooling that is there in the condenser will be calculated using this formula

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Let plug in the formula

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