[]# Futuretron EV Course_PPT Chapter_3

# PPT_CHAPTER3

## Pre-requisite for the course

#### Slide_1: Mass and Weight

* Mass: The amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass.
* Weight: The mass multiplied by the acceleration of gravity.

W = m * g

#### Slide_2: Distance and Displacement

* Distance: The total movement of an object without any regard to direction.


source: https://tse1.mm.bing.net/th?id=OIP.gvzlSDIMtMSjGvabKIPdcQHaET&pid=Api&P=0&w=298&h=174
* Displacement: The change in position of an object. It is a vector quantity and has a direction and magnitude.


#### Slide_3: Uniform motion
Uniform motion: The motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time.

source: https://i.imgur.com/YvQLg0g.png

#### Slide_4: Non-Uniform motion
Non-Uniform motion: The motion of an object in which the object travels with varied speed and it does not cover same distance in equal time intervals, irrespective of the time interval.

source:https://i.imgur.com/rldcgOJ.png

#### Slide_5: Velocity and Acceleration

* Velocity and acceleration both describe motion.
* Velocity: The rate of change of your position with time.

Velocity = distance traveled ÷ time

* Acceleration: The rate of change of velocity with time.

Acceleration = change in velocity ÷ time taken for velocity to change

#### Slide_5: Force

* Force is an external agent capable of changing the state of rest or motion of a particular body.
* The SI unit of force is Newton(N).
* Effects of force
Change in speed
Change in direction
* Types of force
Contact Force
Non-Contact Force

#### Slide_6: Friction

Friction: The resistance that one surface or object encounters when moving over another.

Rolling Friction: The force resisting the motion of a rolling body on a surface.

Sliding friction: There is a restriction on the body’s movement as only one side of the body is in contact with the surface.

#### Slide_7: Laws of Rolling Friction

1. With the increase in smoothness, the force of rolling friction decreases.

2. Rolling friction is expressed as a product of load and constant to the fractional power.
**F = kLn**

3. Rolling friction force is directly proportional to load and inversely proportional to radius of curvature.
**F=μ×Wr**

#### Slide_8: Cause of Rolling Friction

source: https://tse2.mm.bing.net/th?id=OIP.ilshZj9--KbixkjwFBQ-qgAAAA&pid=Api&P=0&w=354&h=154