Grading Resistance | Acceleration Resistance | Dynamic Equation | Adhesion | Wheel Slip | VKV Sir

Full Lecture repository at shorturl.at/DWVHj
In this second part of Vehicle Performance we will discuss about Total Driving Resistance which comprises of Tyre Rolling Resistance, Aerodynamic Drag Resistance, Grade Climbing Resistance and Acceleration Resistance. We will also discuss about Dynamic Equation of vehicle, Maximum Tractive Efforts, Coefficient of Road Adhesion, Adhesion, Dynamic Wheel Radius and Tyre Slip.
If you have not watched previous lectures watch them from below link
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[@KapilKumarAietEAIME]

Best explanation

[@vkvsirdotcom]

In future I will try to explain it completely in English. Besides you can find many good contents in English from IITs and abroad but none of the good lectures and explanation in Hindi. Hope you can understand.

[@LearnwithVishal33]

Good to see u sir each time.

[@sainig5771]

Your efforts are good to explain thi subject

[@015soniyakanojia3]

sir you explain best

[@sainig5771]

You are great sir

[@AbhiRaj-mq7ci]

Nice explanation sir

[@sainig5771]

Very best sir

[@tranimations3700]

very nice

[@sudhakarch55]

Good explanation

[@ankushgupta8228]

A car of weight 1200kg is moving upward on a hilly terrain having grading resistance of 3050 Newton . If rolling resistance is 3 % of road resistance and acceleration due to gravity is 9.8 m / s² , then calculate . i ) Road angle in degree 2.road Resistance Please sir Solve this question

[@vkvsirdotcom]

Step 1: Calculate the road resistance. Road resistance = Grading resistance + Rolling resistance Grading resistance = 3050 Newton Rolling resistance = 3% of grading resistance Rolling resistance = 0.03 * 3050 Rolling resistance = 91.5 Newton Road resistance = Grading resistance + Rolling resistance Road resistance = 3050 + 91.5 Road resistance = 3141.5 Newton Step 2: Calculate the road angle in degrees. Road angle = arctan(grading resistance / (weight * acceleration due to gravity)) Road angle = arctan(3050 / (1200 * 9.8)) Road angle = arctan(3050 / 11760) Road angle ≈ 14.72 degrees So, the road angle is approximately 14.72 degrees.

[@Ajroyalclub]

Gjbb

[@ankushgupta8228]

During upward movement on a slope of 15 degree , a car of weight 1800kg faces aerodynamic drag of 200 Newton . If rolling resistance co - efficient is 0.01 where as acceleration due to gravity is 9.8 m / s² and total driving resistance is 8000 Newton then calculate i ) Acceleration resistance . ii ) Grading Resistance Solve this problem Please sir 🙏

[@vkvsirdotcom]

i) To calculate acceleration resistance, we can use the formula: Acceleration resistance = mass of the car * acceleration due to gravity * sin(slope angle) Acceleration resistance = 1800 kg * 9.8 m/s^2 * sin(15°) Acceleration resistance = 1800 * 9.8 * 0.2588 Acceleration resistance = 4514.92 N ii) To calculate grading resistance, we can use the formula: Grading resistance = mass of the car * acceleration due to gravity * cos(slope angle) + aerodynamic drag + rolling resistance Grading resistance = 1800 kg * 9.8 m/s^2 * cos(15°) + 200 N + 0.01 * 1800 kg * 9.8 m/s^2 Grading resistance = (1800 * 9.8 * 0.9659) + 200 + (0.01 * 1800 * 9.8) Grading resistance = 16821.24 + 200 + 176.4 Grading resistance = 17097.64 N So, the acceleration resistance is 4514.92 N and the grading resistance is 17097.64 N.

[@sanattiwari7668]

👍👍🙏🙏

[@ayushthaware9710]

Abee sanatttttt... Kaisa...

[@015soniyakanojia3]

Thank you sir

[@rossiesomra3783]

Woow

[@vkvsirdotcom]

Thanks

[@sidramappaalur58]

Sir How the acceleration resistance is in cloak wise direction . Please explain

[@vkvsirdotcom]

You have to look it with a reference point.

[@CardboardAutoCraftbydev]

Sir Jaise yah rolling resistance, aerodynamic drag ,grading resistance, acceleration resistance yah sab vehicle kinematics mein aate hai ya dynamic

[@vkvsirdotcom]

kinematics is the study of the motion of objects without regard to the forces that cause the motion. Dynamics is the study of how forces affect the motion of objects. So here we are taking care of various force.

[@mohammadaliarsalan6161]

Sirein Fg= Mg sin (alpha) what is the meaning of mg and Fg

[@CardboardAutoCraftbydev]

Fg= grading force Mg sin (alpha) is value of this And there mg= mass* acceleration constant

[@marimanibalanp1680]

Sir, Will you explain IS standard 13988:2002

[@marimanibalanp1680]

How sin and slope angle were same ???

[@vkvsirdotcom]

Dear, these ISI standards are framed to give equal opportunity and conditions to each vehicle and vehicle manufacturers. Committee recommended the conditions, testing methods to evaluate the performance. This perticular section is for gradeability testing. Actually ARAI follows these instructions while testing and certification of vehicle. Are you preparing for some Vehicle Inspector Exam or for University exams or working as a testing engineer in some plant or agency?

[@vkvsirdotcom]

@@marimanibalanp1680 Tan α is Perpendicular/Base and Sin α is Perpendicular/hypotenuse Now when α is small base and hypotenuse are almost same so we can use sin α for tan α

[@AS-ny5rl]

done 20CS08 E1 AMRIT KUMAR SARAVAGI

[@girijasankardevkumar5453]

If Unit of rotational inertia constant is kg....then the unit of force will never be in Newton (N)..... please check for it

[@vkvsirdotcom]

Yes, a slight glitch may occur. The unit of rotational inertia, also known as moment of inertia, is typically expressed in terms of mass and distance squared. The standard unit for mass is kilograms (kg), and the standard unit for distance is meters (m). Therefore, the unit of rotational inertia is usually expressed in terms of kilograms times meters squared (kg·m²). The unit of force is the Newton (N), where 1 Newton is defined as 1 kilogram meter per second squared (kg·m/s²). So, the unit of force is not directly related to the unit of rotational inertia. However, in rotational dynamics, torque (which is analogous to force in linear dynamics) is the product of force and the lever arm's length. The unit of torque is also expressed in terms of force and distance, and it is measured in Newton-meters (N·m) or Joules (J).

[@anshutiwari3958]

Thank you sir

[@vkvsirdotcom]

Thank you Anshu. Keep sharing with others