Let's take close look to basic and importantconcepts of chapter motion for class 9th Science.
What is Motion?
A body is said to be in motion when it’s position is changes continuously with respect to a stationery object taken as a reference point.
What is Distance?
The actual path covered by a moving body is called Distance that is travelled by a body. It is a scalar quantity.
What is displacement?
The shortest distance between the initial and final position is called displacement. It is a vector quantity.
What is Uniform motion?
A body has a uniform motion when it travels equal distance in intervals of time.
What is Non-Uniform motion?
A body has a non-uniform motion when it travels unequal distance in intervals of time.
What is speed?
Distance travelled by a body per unit time is called speed.
What is Velocity?
Displacement produced by a body per unit time is called Velocity.
What is Acceleration?
Change in Velocity(final velocity – initial velocity) upon change in time is called acceleration.
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Equation of uniformly accelerated motion:-
1.First equation of Motion
The first equation of Motion is as follow :
V = u + at
In the above equation u Is initial velocity, V is final velocity, a is Acceleration and t is time. This is usually used to find the final velocity when distance is not given but acceleration, initial velocity and time.
2.Second equation of Motion
S = ut + ½ × at²
In the above equation, S is Distance, u Is initial velocity, a is Acceleration and t is time.
This equation is used to find the distance when final velocity is not given.
3.Third equation of Motion
The equation of Motion is as follow :
v² = u² + 2as
In the above equation, s is Distance, u Is initial velocity, V is final velocity, a is Acceleration and t is time. This usually help us to find finally velocity when time is given.
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https://drive.google.com/file/d/15yK045oBKxvdB9OaTSjPSzgzHZ7hDTq5/view?usp=drivesdk
Amazing
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