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# System prepended metadata

title: PPT_CHAPTER3

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[]# 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.

![](https://i.imgur.com/axqzUIm.png)

![](https://i.imgur.com/M80djMv.png)
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.
 
 ![](https://i.imgur.com/s9cJuRK.png)

#### 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.

![](https://i.imgur.com/skcm5na.png)
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.

![](https://i.imgur.com/JtzHCQV.png)
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

![](https://i.imgur.com/44tpP6y.png)
source: https://tse2.mm.bing.net/th?id=OIP.ilshZj9--KbixkjwFBQ-qgAAAA&pid=Api&P=0&w=354&h=154

