Acar starts from start to rest and reaches a speed of 40 m/s in 10 s. if acceleration is constant, how fast wil it be moving in 5 s

Car fastly moved in 5s is

Step-by-step explanation:

Given that a car starts from start to rest

so and

and  given car reaches a speed of 40 m/s in 10 s.

ie,  and

Use the formula

ie,                      

  ,    and a = constant

So,  

Similarly,

    (5 seconds later) and   ,  

Then  

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