A ball rolls off the edge of a horizontal roof at a velocity of 10 m/s. One second later, the speed of the ball is about
A)10 m/s.
B)14 m/s.
C)16 m/s.
D)20 m/s.

Question

Quizplus · Accepted Answer

The speed of the ball one second later can be found using the Pythagorean theorem, considering its horizontal velocity (10 m/s) and its vertical velocity due to gravity (9.8 m/s after 1 second). The resultant speed is approximately $\sqrt{10^2 + 9.8^2} \approx 14$ m/s.

A Ball Rolls Off the Edge of a Horizontal Roof