Question

A marble is thrown horizontally with a speed of 7 m/s. When the marble lands, it hastraveled a horizontal displacement of 30 m. How much time was the marble in the air?

Answer 1

t = 4.28 s

Step-by-step explanation:

The horizontal speed of a marble = 7 m/s

The horizontal displacement covered by the marble = 30 m

We need to find the time for which the marble is in air. Let the time is t. Using the formula for speed to find it as follows :

`s=(d)/(t)\\\\t=(d)/(s)\\\\t=(30\ m)/(7\ m/s)\\\\=4.28\ s`

So, it will in the air for 4.28 s.