Home 1st Year Physics Notes 1st Year Physics Chapter 5 Short Questions Notes PDF

# 1st Year Physics Chapter 5 Short Questions Notes PDF

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In this post, I am sharing FSC 1st Year Physics Chapter 5 Short Questions with Answers Notes PDF for the students of Class 11. This is chapter number 5 from the 11th physics textbook and its name is Circular Motion. From this post, students can download the 11th Class Physics Chapter 5 Short Questions Notes in PDF format on their laptops or mobiles to read offline. These Class 11 Physics Chapter 2 Short Questions with Answers are for all the boards working under the Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Kahn Board, and Sahiwal Board. You can also download the complete FSC 1st Year Physics Notes PDF of all chapters from ilmihub.com.

## Class 11 Physics Chapter 5 Short Questions with Answers

### Tangential Velocity:

When a body is moving on a circular path, the velocity  of the body is measured at any time on the circular path called tangential velocity and obtained just by drawing a tangent at any point of the curve mathematically it is given by:

Vt = Dd/Dt
Unit:
its S.I unit is ms-1.

### Angular Velocity:

The time rate of change of angular displacement of a body is called angular velocity

w = Dq/Dt
unit:
Relation between tangential and angular velocity:
the tangential velocity v angular velocity w and the radius r of a wheel are related as:
v = w.r

### Explain what is meant by centripetal force and why it must be furnished to an object to follow a circular path.definition.

The force needed to bend the normally straight path of the particle into a circular path called the centripetal force into a circular path called the centripetal force, is always directed towards the centre of the circle.

Mathematically it is:

F = mv2/r
Significant:
A centripetal force is needed to change the direction of motion of the body continuously moving the circular path

L = mv sin q
In the case of orbital motion, the  angle between the radius and tangential velocity is 900
Hence L = mv sin 900
L = mvr