Energy Of A Bullet Fired Through Planks

Classical Mechanics Level 3

A bullet is fired into a row of planks in such a way that it loses the same amount of kinetic energy for every plank it passes through. If the bullet loses \(5\%\) of its velocity after passing through the first plank, then what is the minimum number of planks required to stop the bullet?

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.