[ u = 4.5,\text{m/s},\quad a = 2.5,\text{m/s}^2,\quad v = 20,\text{m/s}. ]
[ v = u + at \implies 20 = 4.5 + 2.5t \implies 15.5 = 2.5t \implies t = \frac{15.5}{2.5} = 6.2. ]
Answer: 6.2 seconds
11TH•Mathematics•Sequences And Series•Question 13
Overview
An object moving in a line is given an initial velocity of 4.5 m/s and a constant acceleration of 2.5 m/s². How long will it take the object to reach a velocity of 20 m/s?
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