Editor Staff asked 1 year ago
A body moves a distance of 15 m in a 15mins, with an initial velocity of 0m/min. What is the final velocity in m/min?
(a) 2
(b) 8
(c) 5
(d) 6
I got this question in an internship interview.
My question is taken from Kinematic Equations for Uniformly Accelerated Motion in chapter Motion in a Straight Line of Physics – Class 11
Select the correct answer from above options
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Editor Staff answered 1 year ago
The correct choice is (a) 2
Easy explanation: Use the second equation of motion to find the acceleration. s = ut + (1/2)at^2, u = 0, t =15, s=15, therefore, a = 2/15 m/min^2. Now use the first equation to find the final velocity. v = u + at, u = 0, t = 15 min, a = 2/15, therefore, v = 2 m/min.
