KVPY 2019 SA Exam Previous Papers

Question : 18 of 80

Marks: +1, -0

A steel ball is dropped in viscous liquid. The distance of the steel ball from the top of the liquid is shown below. The terminal velocity of the ball is closest to :

0.26 m/s
0.33 m/s
0.45 m/s
0.21 m/s
KVPY_2019_SA_Exam_18_q

Validate

Solution:

The steel ball will get terminal velocity when the net force on the ball is zero. So, in distance–time graph, slope become constant.
From graph :

V={0.4 -0.3}/{1.9- 1.6}

≈ 0.33 m/s

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