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
ale4655 [162]
3 years ago
7

The engineer of a passenger train traveling at 25.0m/s sights a freight train whose caboose is 200m ahead on the same track. The

freight train is traveling at 15.0 m/s in the same direction as the passenger train. The engineer of the passenger train immediatly applies the brakes causing a constant acceleration of .100m/s^2 in a direction opposite to the trains velocity, while the freight train continues with constant speed. will there be a collision?
Physics
1 answer:
Vika [28.1K]3 years ago
5 0

Answer:

No, there won't be a collision.

Explanation:

We will use the constant acceleration formulas to calculate,

v = u + a*t

0 = 25 + (-0.1)*t

t = 250 seconds (the time taken for the passenger train to stop)

v^2 = u^2 + 2*a*s

0 = (25)^2  + 2*(-0.1)*s

s = 3125 m (distance traveled by passenger train to stop)

If the distance traveled by freight train in 250 seconds is less than (3125-200=2925 m) than the collision will occur

Speed*time = distance

Distance = (15)*(250)

Distance = 3750 m

As the distance is way more, there won’t be a collision

You might be interested in
How can Climate Change impact the formation of Hurricanes?
Orlov [11]
Climate change may affect tropical cyclones in a variety of ways: an intensification of rainfall and wind speed, a decrease in overall frequency, an increase in frequency of very intense storms and a poleward extension of where the cyclones reach maximum intensity are among the possible consequences
4 0
3 years ago
Read 2 more answers
A certain shade of blue has a frequency of 7.24 × 1014 Hz. What is the energy of exactly one photon of this light?
ANEK [815]
E = hf

E = 6.63* 10 ⁻³⁴ * 7.24* 10¹⁴

<span>E = 4.80012 × 10⁻¹⁹ J</span>
4 0
3 years ago
Read 2 more answers
Which of the following choices defines energy in scientific terms?
snow_tiger [21]
1) B. Energy is the ability to do work

2) C. Energy is conserved, it just goes from one form to another.

3) Work = Force x displacement
= 300 x 100 = 30,000 Joules

4) leaning a brick because no displacement is taking place.

5) They change the amount/strength or direction of the force needed.

6) Less force is needed and applied over a longer distance.

7) Heat is the flow of thermal energy from one object to another.
8 0
3 years ago
Read 2 more answers
The rules and expectations concerning correct or polite behavior is called _______________________.
aalyn [17]
The answer would be etiquette!
7 0
3 years ago
It takes 9 sec for a 10 newton force to move an object 4 meters to the right. What is direction &amp; magnitude of the force
lana66690 [7]

Answer:

the question is wrong

Explanation:

  1. M is not given
  2. after 9 second the acceleration multiply by the time divided by two then multiplied by the time is equal to 4 meter
  3. ((10/Mm/s *9s-)
3 0
3 years ago
Other questions:
  • The activation temperature of most ice-forming nuclei is ______ 0 oc.
    11·1 answer
  • on cloudless nighs, heat escapes from our planet and goes into empty space A.conduction B.convection C.radiation
    9·2 answers
  • A wire carrying a 32.0 A current passes between the poles of a strong magnet such that the wire is perpendicular to the magnet's
    15·1 answer
  • A star is twice as massive as the sun. How will it's lifespan compare???
    13·2 answers
  • The student moves his leg 34 cm sideways as shown.
    7·2 answers
  • Find the angle between the vectors |A+B|=|A-B|​
    9·1 answer
  • Wht is the mass number of 19k/39
    10·1 answer
  • Define Simple harmonic motion (SHM). A body moving with SHM has an amplitude of 10 cm and a frequency of 100 Hz. Find (a) the pe
    10·1 answer
  • A 13.3 kg box sliding across the ground
    8·1 answer
  • If an object with a mass of 248kg is lifted 76 meters in 18 seconds, how much power is used?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!