Question

A car travelling with a velocity of 40m/s came to rest in 8s.What is its acceleration


A) -5 m/s²
B) -4 m/s²
C) 8 m/s²
D) 2 m/s²
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Answer 1

Answer:

u= 40 m/s , v= 0m/s ,t= 8s

v= u+at

a= v- u /t = 0- 40/ 8 m/ s2

= - 5 m/s2

Explanation:

so answer is option a

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Answer 2

Answer:

Its a

Explanation:

Since we know that

$a = \frac{u - v}{t} \\ a = \frac{0 - 40}{8} \\ a = \frac{ - 40}{8} \\ a = - 5m \: {s}^{ - 1}$

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