Question

a car takes off from rest and covers a distance of 80m on a straight road in 10s.calculate the magnitude of its acceleration

Answer 1

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Here's the solution :

Let's find the final velocity :

• 
  `(displacement)/(time)`

• 
  `(80)/(10)`

• 
  `8 \: \: ms {}^( - 1)`

Initial velocity (u) = 0 (cuz it started from rest)

Final velocity (v) = 8 m/s

Time taken (t) = 10 sec

now, we know that :

• 
  `acceleration = (v - u)/(t)`

• 
  `(8 - 0)/(10)`

• 
  `(8)/(10)`

• 
  `0.8 \: \: m {s}^( - 2)`

Acceleration = 0.8 m/s²