Answer to Question #279862 in Mechanics | Relativity for BxJ

Mechanics | Relativity

Question #279862

A automobile starts from rest and is given a constant acceleration of 5 m/s². How long will it take before it attains a speed of 20 m/s?

Expert's answer

"u=0m\/s"

"v=20m\/s"

"a=5m\/s^2"

"t=?"

"v=u+at"

"20=0+5t"

"t=20\/5=4s"

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