Catch This Embarrassing Moment on Camera

Classical Mechanics Level 1

A teenager accidentally falls off a 10-meter-high platform diving board. His friend whips out his camera and takes a picture when the teenager is halfway to the water below to commemorate the embarrassing event and posts it on Facebook. How many seconds after the teenager fell off did his friend take the picture?

Details and assumptions

The acceleration of gravity is \(-9.8~\mbox{m/s}^2\).
Neglect the size of the teenager.

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, interactive explorations.

Used and loved by over 5 million people

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