Answer to Question #179382 in Physics for John rey

Question

A marble rolls of the edge of a table top with an initial speed of 12.0 m/s.in 1.1 seconds, how far does it travel horizontally

Answer 1

The time of falling is $t = 1.1s$. The motions along the vertical and horizontal directions are independent, and there is no acceleration in horizontal directon (assuming Earth's gravity acts downward). Thus, the marble will maintain the initial speed $v = 12.0m/s$ throughout the entire motion. Thus, the distance covered horizontaly will be:

$$d = vt = 12.0m/s\cdot 1.1s =13.2 m/s$$

Answer. 13.2 m/s.