An engine can pull four coaches at a max...

An engine can pull four coaches at a maximum speed of `20ms^-1`. The mass of the engine is twice the mass of every coach. Assuming resistive forces to be proportional to the weight, approximate maximum speeds of the engine, when it pulls `12` and `6` coaches, are

`8.5 ms^(-1) and 15 ms^(-1)` respectively

`6.5 ms^(-1) and 8 ms^(-1)` respectively

`8.5 ms^(-1) and 13 ms^(-1)` respectively

`10.5 ms^(-1) and 15 ms^(-1)` respectively

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

NTA NEET TEST 111
NTA MOCK TESTS|Exercise PHYSICS|45 Videos
NTA NEET TEST 22
NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

An engine can move at the speed of 20/3 m/s without any wagon attached and reduction in the speed of the train is directly proportional to the square root of the number of wagons attached to the engine. When there are 9 wagons attached its speed is 5 m/s. The greatest number of wagons with which the engine can move is :

Assume the aerodynamic drag force on a car is proportional to its speed. If the power output from the engine is doubled, then the maximum speed of the car

An engine is pulling a train of mass m on a level track at a uniform speed u . The resistive froce offered per unit mass is f .

A car can pull a trailer of twice its mass up a certain slope at a maximum speed V. Without the trailer the maximum speed of the car, up the same slope is 2 V. The resistance to the motion is proportional to mass and square of speed. If the car (without trailer) starts to move down the same slope, with its engine shut off, prove that eventually it will acquire a constant speed. Find this speed.

A car can pull a trailer of twice its mass up a certain slope at a maximum speed v=1m//s . Without the trailer the maximum speed of the car up the same slope is 2v . The resistance to the motion is proportinal to mass and square of speed. If the car (without trailer) starts to move down the same slope, with its engine shut off, eventually it will acquire a constant speed v_(t) , then find v_(t)^(2) (in m^(2)//s^(2) )

A car of mass 900 kg accelerates uniformly from rest to a speed of 60 km/h in a time of 2 s when traveling on a level road. If there is a constant resistance to motion of 20 N. Find the maximum power ( in kW) of the engine.

A train has a constant speed of 40 ms^(-1) on a level road against resistive force of magnitude 3xx10^(4) N . Find the power of the engine.

A roller -coaster car a mass of 500 kg when fully loaded with passengers a. If the vehicle has a speed of 20.0ms^(-1) at point what is the force exerted by the track on the car at this point ? b. What is the maximum speed the vehicle can have point B and still remain on the track?

NTA MOCK TESTS-NTA NEET TEST 112-PHYSICS

Two point masses of 3.0 kg and 1.0 kg are attached to opposite ends of...
Text Solution
|
A simple harmonic motion is represented by x(t) = sin^2 omegat - 2 cos...
Text Solution
|
About 5% of the power of a 100 W light bulb is converted to visible ra...
Text Solution
|
A light beam consists of two types of photons. In one type, each photo...
Text Solution
|
In each heart beat, a heart pumps 80 ml blood at an average pressure o...
Text Solution
|
If two wires of same length l and are of the cross-section A with youn...
Text Solution
|
The correct curve between refractive index mu and wavelength lambda wi...
Text Solution
|
When the angle of incidence on a material is 60^(@), the reflected lig...
Text Solution
|
For a circular cardboard of uniform thickness and mass M, a square dis...
Text Solution
|
Consider the following diagram. In which direction, the motion of the ...
Text Solution
|
The V-I characteristic of a diode is shown in the figure. The ratio of...
Text Solution
|
A common emitter amplifier has a voltage gain of 50, an input impedanc...
Text Solution
|
At constant temperature if the pressure of an ideal gas is increased b...
Text Solution
|
The resistance R= (V)/(I), where V= (100+-5.0) V and I=(10+-0.2)A. Fin...
Text Solution
|
In Young's double-slit experiment, if yellow light is replaced by blue...
Text Solution
|
A parallel beam of light of wavelength 4000 Å passes through a slit of...
Text Solution
|
If in a resonance tube, oil of density higher than that of water is u...
Text Solution
|
Which frequency produces a sound that can be heard by a person?
Text Solution
|
A simple pendulum is released from A as shown. If m and 1 represent th...
Text Solution
|
An engine can pull four coaches at a maximum speed of 20ms^-1. The mas...
Text Solution
|