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
nadezda [96]
2 years ago
8

A train consists of a 50 Mg engine and three cars, each having a mass of 30 Mg . If it takes 75 s for the train to increase its

speed uniformly to 45 km/h , starting from rest, determine the force T, developed at the coupling between the engine E and the first car A. The wheels of the engine provide a resultant frictional tractive force F which gives the train forward motion, whereas the car wheels roll freely. Also, determine F acting on the engine wheels.
Engineering
1 answer:
ohaa [14]2 years ago
7 0

Answer:

T = 15 kN

F = 23.33 kN

Explanation:

Given the data in the question,

We apply the impulse momentum principle on the total system,

mv₁ + ∑\int\limits^{t2}_{t1} {Fx} \, dt = mv₂

we substitute

[50 + 3(30)]×10³ × 0 + FΔt = [50 + 3(30)]×10³ ×  ( 45 × 1000 / 3600 )  

F( 75 - 0 ) =  1.75 × 10⁶

The resultant frictional tractive force F is will then be;

F =  1.75 × 10⁶ / 75

F = 23333.33 N

F = 23.33 kN

Applying the impulse momentum principle on the three cars;

mv₁ + ∑\int\limits^{t2}_{t1} {Fx} \, dt = mv₂

[3(30)]×10³ × 0 + FΔt = [3(30)]×10³ ×  ( 45 × 1000 / 3600 )  

F(75-0) = 1.125 × 10⁶

The force T developed is then;

T =  1.125 × 10⁶ / 75

T = 15000 N

T = 15 kN

You might be interested in
A rigid insulated tank is divided into 2 equal compartments by a thin rigid partition. One of the compartments contains air, ass
Illusion [34]
Https://www.slader.com/discussion/question/an-insulated-rigid-tank-is-divided-into-two-equal-parts-by-a-partition-initially-one-part-contains-4/



there will be the answer

6 0
2 years ago
Just some random stufff
NeTakaya

Answer:

Nice!

Explanation:

5 0
3 years ago
Which of the following are hazards associated with portable ladders?
PilotLPTM [1.2K]

Answer:

A,C, and D

Explanation:

Potible ladders have to configure with many designs in mind but the most evedent is that they are usally unstable

BRAINLIEST PLS

7 0
3 years ago
Read 2 more answers
he circular stream of water from a faucet is observed to taper from a diameter of 21 mm to 12 mm in a distance of 52 cm. Determi
Gemiola [76]

Answer: 1.52 × 10^{-3} \frac{m^{3} }{s}

Explanation:

Please kindly find the attached document for the answer.

5 0
2 years ago
Describe the greatest power in design according to Aravena?
Ann [662]

Answer: Describe the greatest power in design according to Aravena? The subject of Aravena’s recent Futuna Lecture Series in New Zealand was ‘the power of design,’ which he described as ultimately being “the power of synthesis” because, increasingly, architects are dealing with complex issues and problems.

What are the three problems with global urbanization? 1. Degraded Environmental Quality ...

2. Overcrowding ...

3. Housing Problems ...

4. Unemployment ...

5. Development of Slums...

How could you use synthesis in your life to solve problems? Hence, synthesis is often not a one-time process of solution design but is used in combination with problem understanding and solution analysis to progress towards a more complete understanding of problems and solutions over time (see Applying the Systems Approach topic for a more complete discussion of the dynamics of this aspect of the approach).

I got all three answers

4 0
2 years ago
Other questions:
  • The future of work is characterised by choose all that apply
    11·1 answer
  • Can I get a hand? Thanks y’all much luv
    13·1 answer
  • 2. The initially velocity of the box and truck is 60 mph. When the truck brakes such that the deceleration is constant it takes
    12·1 answer
  • (TCO 1) Name one disadvantage of fixed-configuration switches over modular switches. a. Ease of management b. Port security b. F
    6·1 answer
  • Write a program to calculate overtime pay of 10 employees. Overtime is paid at the rate of Rs. 12.00
    13·1 answer
  • Recommend the types of engineers needed to collaborate on a city project to build a skateboard park near protected wetlands.
    6·1 answer
  • Difference between theory and practice?​
    10·1 answer
  • Name eight safety electrical devices including their functions and effects if not present.​
    15·1 answer
  • Help please!!!!!
    12·1 answer
  • How can the use of local materials improve the standard of living of Filipinos?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!