Question

if a body loses half of its velocity on penetrating 3cm in a wooden block then how much will it penetrate more before coming to rest?

Answer 1

The body losses it's half velocity when it penetrates through 3cm in a wooden block so it will travel more 3cm to come to rest.

Answer 2

Explanation:

For one plank

u=u

body loses 1/nth of its velocity

Here 1/n = 1/2

2=n

then the body will penetrate more before it comes to rest is

((n-1)^2)/2n-1 is multiplied by the distance of penetration.

So, ((2-1)^2)/(2×1)-1 ×3

=1/3 × 3

=1cm