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Motion Class 9 Flashcards

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Questions and Answers

What is uniform motion?

Motion with a change in speed

Motion with varying speed

Motion in a straight line at a constant speed (correct)

Motion that changes direction

What defines non-uniform motion?

Motion with a change in speed, direction, or both (correct)

Motion in a straight line

Motion that is circular

Motion with a constant speed

What is acceleration?

Change in velocity per unit time.

What is uniform acceleration?

When the velocity of a body increases/decreases by equal amounts in equal intervals of time. Signup and view all the answers

What is non-uniform acceleration?

When the velocity of a body increases/decreases by unequal amounts in equal intervals of time. Signup and view all the answers

What is the velocity-time formula?

v = u + at Signup and view all the answers

What is the position-time formula?

s = ut + 1/2 at² Signup and view all the answers

What does the position velocity formula 2as = v² - u² represent?

It relates acceleration, final velocity, and initial velocity. Signup and view all the answers

The slope of a distance-time graph will give you __________.

speed Signup and view all the answers

The slope of a velocity-time graph will give you __________.

acceleration Signup and view all the answers

The area under a velocity-time graph will give you __________.

distance Signup and view all the answers

Study Notes

Types of Motion

Uniform motion: Occurs at a constant speed moving in a straight line.
Non-uniform motion: Involves changes in speed, direction, or both.

Acceleration Concepts

Acceleration: Defined as the change in velocity per unit time.
Uniform acceleration: Velocity changes by equal amounts in equal time intervals while moving in a straight line.
Non-uniform acceleration: Velocity changes by unequal amounts in equal time intervals, involving changes in direction or both.

Key Formulas in Motion

Velocity time formula: ( v = u + at )
- Where ( v ) is final velocity, ( u ) is initial velocity, ( a ) is acceleration, and ( t ) is time.
Position time formula: ( s = ut + \frac{1}{2} at^2 )
Position velocity formula: ( 2as = v^2 - u^2 )

Graphical Interpretations

Distance time graph: The slope indicates speed.
Velocity time graph: The slope indicates acceleration.
Area under the velocity time graph: Represents the distance traveled.

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Description

Explore key concepts in motion with these flashcards designed for Class 9 students. Learn about uniform and non-uniform motion, acceleration, and uniform acceleration. Perfect for quick study and revision.