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# FSC 1st Year Physics Chapter 3 Notes PDF

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In this post, I am sharing FSC 1st Year Physics Chapter 3 Notes PDF for the students of Intermediate Part 1. This chapter’s name is Motion and Force. Students can download 11th class chapter 3 Motion and Force Notes PDF in there laptop or mobile. These Physics Notes are for all the boards working under Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Kahn Board, and Sahiwal Board. Here are the complete FSC 1st Year Physics Notes PDF chapterwise.

## FSC Part 1 Physics Chapter 3 Motion and Force Notes PDF Download

### Define Motion.

If a body changes its position with respect to its surroundings, it said to be in motion. For example; a car moving on road

### Define displacement.

Shortest distance between two points called displacement. OR the displacement is a change in the position of body from its initial position to final position.
SI unit of displacement is meter (m)
the dimension of displacement is [L]

### Define velocity.

The time rate of change of displacement known as velocity. It is a vector quantity. Its direction is along the direction of displacement. Mathematically, average velocity can written as
V= d/t
it’s SI unit is ms-1 and its dimension are [L.T-1]

### Differentiate Uniform, Variable and instantaneous velocity.

Uniform velocity;
if a body covers equal displacements in equal intervals of time, it is said to be moving with uniform velocity.

Variable velocity;
if a body covers different displacements in equal intervals of time than body is moving with variable velocity

Instantaneous velocity;
If the velocity of the body is not uniform then instantaneous velocity of the body to be measured and it is defined as;
the velocity of the body measured at any particular instant of time.

### Define acceleration.

The time rate of change of velocity of the body called acceleration. Mathematically,
a = Dv/Dt

### What is average acceleration?

Consider a body whose velocity changes from v1 to v2  in a short interval of time, the average acceleration during the time interval is

aavg =  ­ v2 – v1 /Dt

aavg = Dv/Dt

### Define uniform acceleration.

if the velocity of the body changes uniformly in equal intervals of time, however, short the interval may be, then acceleration is said to be uniform
the uniform acceleration in practical life is the acceleration due to gravity. Its value is 9.8 m/sec2 in vertical downward direction.

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