First Equation of Motion


 
 
Concept Explanation
 

First Equation of Motion

FIRST EQUATION OF MOTION:

large v=u+at,  Final velocity = initial velocity + acceleration large times time interval,

By definition,  large acceleration=frac{change;in;velocity}{time;taken}=frac{final;velocity-initial;velocity}{time; taken}

      or        large a=frac{v-u}{t}Rightarrow at=v-u

      or        large v=u+at                          

Sample Questions
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Question : 1

A bus increases its speed from 36 km/h to 72 km/h in 10 seconds .  Its acceleration is :

Right Option : D
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Question : 2

A body A starts from rest with an accelerration large a_1 . After 2 seconds,another body B starts from rest with an acceleration large a_2 . If they travel equal distances in the 5th second, after the start of A, then the ratio large a_1:a_2 is equal to ?

Right Option : A
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Question : 3

The initial velocity of a cyclist was 4m/s. His acceleration is large 2m/sec^2 , its velocity after 5 seconds is  _____________

Right Option : C
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