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a bullet entering a wooden plank of thickness t horizontally comes out with a speed reduced by n times. the thickness the plank should have had so that the bullet should just comes out of it after hitting it with some horizontal speed would be

a bullet entering a wooden  plank of thickness t horizontally comes out with a speed reduced by n times. the thickness the plank should have had so that the bullet should just comes out of it after hitting it with some horizontal speed would be

Grade:12th pass

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Dear student

The initial speed be u
final speed is u/n
for thickness t

a= ( (u^2)/(2t) ) *(1- (1/(n^2)) )

now we know a we know u

final velocity would be 0

find the thickness

ie u^2 / (2a)

plugin value of a

Regards

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