Question

all the formulas of class 9 chapter 8 motion​

Answer 1

Formulas of Chapter Motion :-

In this chapter at first we have to learn about acceleration,

Acceleration :-

Acceleration of a body can be defined as the rate of change of velocity per unit time.

• SI unit of acceleration m/s²

• Formula of acceleration :- a = v - u/t

• Acceleration is vector quantity.

Where,

• a = Acceleration
• v = Final velocity
• u = Initial velocity
• t = Time taken

Equations of Motion :-

• First equation :

→ v = u + at

Where,

• a = Acceleration
• v = Final velocity
• u = Initial velocity
• t = Time

• Second equation :

→ s = ut + ½ at²

Where,

• s = Distance
• a = Acceleration
• u = Initial velocity
• t = Time

• Third equation :

→ v² = u² + 2as

Where,

• v = Final velocity
• u = Initial velocity
• s = Distance
• a = Acceleration

Points to be remember while solving questions :

• If a body starts from rest,its initial velocity, u = 0.

• If a body comes to rest (it stops),its final velocity, v = 0.

• If a body moves with uniform velocity,its acceleration (a) = 0.