Center of MassHard
Question
If a body looses half of its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest?
Options
A.1 cm
B.2 cm
C.3 cm
D.4 cm
Solution
Let the initial velocity of the body be v. Hence the final velocity = v/2
Applying v2 = u2 - 2as ⇒
= v2 - 2.a.3 ⇒ a = v2 / 8
In IInd case when the body comes to rest, final velocity = 0, initial velocity =
Again, (0)2 =
- 2. 
. s ; or s = 1 cm
Applying v2 = u2 - 2as ⇒
= v2 - 2.a.3 ⇒ a = v2 / 8In IInd case when the body comes to rest, final velocity = 0, initial velocity =
Again, (0)2 =
- 2. . s ; or s = 1 cmCreate a free account to view solution
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