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ella [17]
3 years ago
12

what is the displacement of a car with an acceleration of 4.00 m/s2 as it increases its speed from 10.0 m/s to 30.0 m/s ?

Physics
1 answer:
sattari [20]3 years ago
6 0

Answer:

100 m

Explanation:

We can use equation of motion to solve this

{v}^{2}  = u {}^{2}  + 2as \\ 30 {}^{2}  =  {10}^{2}  + 2(4.0)s \\ s = 100m

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a car takes 1 hour to travel 100 km along a main road and the half hour to travel 20 km along a side road what is its average sp
kolezko [41]
80 km per hour i believe. i’ll admit i’m american so we don’t use km lol, but the math should be the same. total distance = 120km, and total time = 1.5 hours. 120/1.5 = 80.
3 0
3 years ago
Please Help Quick ASAp Hurry
mamaluj [8]

Answer:

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olasank [31]

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3 years ago
If the specific gravity of copper is 8.91, it weighs:
denis-greek [22]

Answer:

Option D is the correct answer.

Explanation:

The specific gravity of copper is 8.91.

We have

            \frac{\texttt{Density of copper}}{\texttt{Density of water}}=8.91\\\\\texttt{Density of copper}=8.91\times 1000kg/m^3=8910kg/m^3

We also have

           1 kg = 2.205 lb

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Substituting

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Option D is the correct answer.

6 0
2 years ago
Worth 50 point!!!
olasank [31]

Answer:

Chief Hopper

Explanation:

Mike travels at a constant speed of 3.1 m/s.  To find how long it takes him to reach the school, we need to find the distance he travels.  We can do this using Pythagorean theorem.

a² + b² = c²

(1000 m)² + (900 m)² = c²

c ≈ 1345 m

So the time is:

v = d / t

3.1 m/s = 1345 m / t

t ≈ 434 s

Next, Chief Hopper travels a total distance of 1900 m, starting at rest and accelerating at 0.028 m/s².  So we can use constant acceleration equation to find the time.

d = v₀ t + ½ at²

1900 m = (0 m/s) t + ½ (0.028 m/s²) t²

t ≈ 368 s

So Chief Hopper reaches the school first, approximately 66 seconds before Mike does.

3 0
3 years ago
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