A bullet is fired normally on an immovable wooden plank of thickness 2 m. It loses 20% of its kinetic energy in penetrating a thickness 0.2 m of the plank. The distance penetrated by the bullet inside the wooden plank is

A bullet is fired normally on an immovable wooden plank of thickness 2

1.	A bullet is fired normally on an immovable wooden plank of thickness 2 m. It loses 20% of its kinetic energy in penetrating a thickness 0.2 m of the plank. The distance penetrated by the bullet inside the wooden plank is
Answer» <html><body><p>0.2m<br/>0.8m<br/>1m<br/><a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>.5m</p>Solution :The wood offers a constant retardation. If the <a href="https://interviewquestions.tuteehub.com/tag/bullet-403823" style="font-weight:bold;" target="_blank" title="Click to know more about BULLET">BULLET</a> loses 20% of its kinetic energy by <a href="https://interviewquestions.tuteehub.com/tag/penetrating-2919730" style="font-weight:bold;" target="_blank" title="Click to know more about PENETRATING">PENETRATING</a> 02 m. It can <a href="https://interviewquestions.tuteehub.com/tag/penetrate-590781" style="font-weight:bold;" target="_blank" title="Click to know more about PENETRATE">PENETRATE</a> further into `4xx 0.2 = 0.8 m` with the remaining kinetic energy So the total <a href="https://interviewquestions.tuteehub.com/tag/distance-116" style="font-weight:bold;" target="_blank" title="Click to know more about DISTANCE">DISTANCE</a> penetrated by the bullet is `0.2 + 0.8 = 1 m`</body></html>