1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gemiola [76]
3 years ago
5

A subway train accelerates from rest at one station at a rate of 1.30 m/s^2 for half of the distance to the next station, then d

ecelerates at this same rate for the second half of the distance. If the stations are 3200m apart, find the time of travel (in seconds) between the two stations.
Physics
1 answer:
Minchanka [31]3 years ago
7 0

This problems a perfect application for this acceleration formula:

         Distance = (1/2) (acceleration) (time)² .

During the speeding-up half:     1,600 meters = (1/2) (1.3 m/s²) T²
During the slowing-down half:    1,600 meters = (1/2) (1.3 m/s²) T²

Pick either half, and divide each side by  0.65 m/s²: 

                         T² = (1600 m) / (0.65 m/s²)

                         T = square root of (1600 / 0.65) seconds

Time for the total trip between the stations is double that time.

                         T =  2 √(1600/0.65) = <em>99.2 seconds</em>  (rounded)


You might be interested in
Over the past 150 years, what has happened to the amount of forest cover in Minnesota?
Airida [17]
I think D. None of the above

I think that it
4 0
3 years ago
Correctly round the following number to the ten thousandths place<br> 3.68274
Sergeu [11.5K]
The answer to this question is 3.69
5 0
3 years ago
In ionic bonds what happens to electrons?
OverLord2011 [107]
I think the correct answer from the choices would be that metals donate electrons to nonmetals. Ionic bonding involves transfer of valence electrons. The metal looses its valence electrons which makes it a cation while the nonmetal accepts these electrons.
6 0
2 years ago
Read 2 more answers
In a chart the independent variable goes on the ___________. Question 5 options: left right middle
I am Lyosha [343]
The answer i think is left

6 0
3 years ago
Read 2 more answers
A runner accelerates toward the finish line.
Brut [27]
C the runners feet pushing against the ground describes the acceleration toward the finish line
6 0
3 years ago
Other questions:
  • A race car is one lap behind the lead race car when the lead car has 44 laps to go in a race. If the speed of the lead car is 55
    15·1 answer
  • An example of vector quantity thats not a force
    6·1 answer
  • 16 + 6 - 6x - 4= -7x + 3 + 7​
    14·1 answer
  • The quantity of heat from a chemical reaction comes from
    12·1 answer
  • A glass of water sits on a scale. The scale reads 4.78 N. A steel bolt weighs 2.07 N. The density of steel is 7.86 g/cm3. We tie
    14·1 answer
  • A magnet that is dropped may lose its ______.​
    9·1 answer
  • A 0.8 g object is placed in a 534 N/C uniform electric field. Upon being released from rest, it moves 12 m in 1.2 s. Determine t
    12·1 answer
  • Hii please help i’ll give brainliest if you give a correct answer please please hurry
    7·1 answer
  • the sputnik 1 satellite orbited earth (mass=5.98 x 10^24 kg) in a circle of radius 6.96 x 10^6 m. what was its orbital velocity?
    10·2 answers
  • Please help today exam
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!