Question

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⭐ What is speed ?

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Answer 1

• speed is a scalar quantity
• speed is measured as the ratio of distance to the time ( distance covered ÷ time taken ) , s = d ÷ t .
• the units of speed are :

1. In CGS system : cm / s¹

2. In SI system : m/ s¹

• Dimensional Formula of speed = Dimensional formula of distance ÷ Dimensional formula of time .

So, the dimensional formula of speed is

= M⁰L¹T⁰ ÷ M⁰L⁰T¹

• Types of speed = There are 4 types

(i) Uniform Speed

(ii) Variable Speed

(iii) Average Speed

(iv ) Instantaneous Speed

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Answer 2

Speed : -

• The rate at which someone or something moves or is able to move or operate.

• Rate of change of distance by time is known as speed

• Speed is the scalar quantity that is the magnitude of the velocity vector. It doesn't have a direction