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A motorcycle starting from rest is uniformly accelerated such that its velocity in 10s is...

Physics
WAEC 2020

A motorcycle starting from rest is uniformly accelerated such that its velocity in 10s is 72kmhr\(^{-1}\). What is its acceleration?

  • A. 108ms\(^2\)
  • B. 86ms\(^2\)
  • C. 4ms\(^2\)
  • D. 2ms\(^2\)
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Correct Answer: Option D
Explanation

 

where u = o m/s,     t = 10s,    

 v = 72kmhr\(^{-1}\) --->  (72 X 1000) / 3600

: v = 20 m/s

Acceleration (a) = ( v - u ) / t ---> (20 - 0) / 10 

: a = 2m/s\(^2\)


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