Question

Two marbles roll off a table at the same moment. One of the marbles has a horizontal speed of 1 inch per second, and the other has a horizontal speed of 4 inches per second.

(a) Which marble hits the ground first?

(b) If the surface of the table is 3 feet from the ground, what are the speeds of the marbles as they hit?

Short answer

(a)$\frac{36}{1}inches/sec$

(b) $\frac{36}{4}=9inches/sec$

Step-by-step solution

Step 1. Given 

Two marbles roll off a table at the same moment. One of the marbles has a horizontal speed of 1 inch per second, and the other has a horizontal speed of 4 inches per second.

Part (a) Step 2. Explanation

The marble which has horizontal speed less will hit the ground first.

Part(b) Step 3.  Calculation

The speed of the first marble is $\frac{36}{1}inches/sec$.

The speed of the second marble is$\frac{36}{4}=9inches/sec$