Evaluate the speed of train, Mechanical Engineering

Assignment Help:

Evaluate the speed of train:

A train of mass 200KN has frictional resistance of 5N per KN. Speed of train, at the top of an inclined of 1 in 80 is 45 Km/hr. Find speed of train after running down the incline for 1Km.

Sol: Given,

Mass m = 200KN, Frictional resistance Fr  = 5N/KN, sin   = 1/80 = 0.0125,

Initial velocity u = 45Km/hr = 12.5m/sec, s = 1km = 1000m

The total frictional resistance = 5 X 200 = 1000N   = 1KN                                                                     ...(i)

Force responsible for sliding = Wsinθ   = 200 X 0.0125 = 2.5KN

Net force, F = F - Fr  = ma

2.5 - 1 = (200/9.81)a

a = 0.0735 m/sec2                                                                                                                                     ...(ii)

Apply equation, v2 = u2  + 2as

v2 = 0 + 2 X 0.0735 X 1000

v = 12.1 m/sec                                                                 .......ANS

 


Related Discussions:- Evaluate the speed of train

Points of contraflexure, Points of Contraflexure: Assume M 1 , M 2 , ....

Points of Contraflexure: Assume M 1 , M 2 , . . . and M 6 be the points of contraflexure, where bending moment changes sign. To determine the position of M 2 , let a section

Specific heat - thermodynamics, Specifi c Heat: The specific Heat of ...

Specifi c Heat: The specific Heat of a solid or liquid can be usually defined as heat required for raising unit mass through one degree temperature rise. That is,   dQ = m

Direct stress, diff.between direct stress and bending stress

diff.between direct stress and bending stress

Mechanics, definition of open and cross belt drive

definition of open and cross belt drive

Give that the reaction between the cup of one sphere, Two similar heavy sph...

Two similar heavy spheres of 50mm radius are in equilibrium within a smooth cup of 150mm radius. Give that the reaction between the cup of one sphere is just double than that betwe

Just-in-time, Just-In-Time: This unit begin with the discussion of Jus...

Just-In-Time: This unit begin with the discussion of Just-In-Time strategy. Several terms used in the process are also explained. JIT is an encompassing philosophy considering

Engine oil replacement procedure, Engine oil replacement Motorcycle i...

Engine oil replacement Motorcycle is thoroughly drained by kicking the vehicle several times. Inspect the drain bolt washer and replace if necessary. Tighten the drai

Objectives of tools and equipment , Objective: After studying tools and eq...

Objective: After studying tools and equipment, you should be able to list various tools, measuring equipment required in a motorcycle workshop, and identify and use ap

Compression ratio-bottom dead centre, Compression Ratio (r): It is th...

Compression Ratio (r): It is the ratio of the total cylinder volume when the piston is at the bottom dead centre, V t to the clearance volume, V C . R= v t /v c

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd