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Problem
Problem
A body starts moving with a velocity
v
0
=
10
ms
−
1
v_0 = 10 \text{ ms}^{-1}
v
0
=
10
ms
−
1
. It experiences a retardation equal to
0.2
v
2
0.2v^2
0.2
v
2
. Its velocity after
2
s
2 \text{ s}
2
s
is given by a.
+
2
ms
−
1
+2 \text{ ms}^{-1}
+
2
ms
−
1
b.
+
4
ms
−
1
+4 \text{ ms}^{-1}
+
4
ms
−
1
c.
−
2
ms
−
1
-2 \text{ ms}^{-1}
−
2
ms
−
1
d.
+
6
ms
−
1
+6 \text{ ms}^{-1}
+
6
ms
−
1
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