Question

I drop an egg from a certain distance and it takes the egg 3.74 seconds to reach the ground. How high up was the egg?

A. - 34.3m
B. 68.6m
C. 34.3m
D. - 68.6m

Answer 1

B. 68.6m

Step-by-step explanation:

Free Fall Motion

When a body is left to move in the air with no friction, the motion is ruled only by the force of gravity. The vertical distance a body travels in the air after a time t is .

`\displaystyle y=(gt^2)/(2)`

We know the egg takes 3.74 seconds to reach the ground. The height it was launched from is

`\displaystyle y=((9.8)(3.474)^2)/(2)`

`\displaystyle y=68.54\ m`

The closest correct option is

B. 68.6m