The body falls freely from a height of 80 m. What is his movement in the last second of the fall?

1. Let’s compose the equation for finding the fall time (we will take the acceleration of gravity g to be equal to 10 m / s ^ 2):

80 = g * t ^ 2/2;

160 = 10 * t ^ 2;

t ^ 2 = 160/10;

t ^ 2 = 16;

t = 4;

2. The entire flight of the body was 4 seconds. Let’s find the distance that the body flew in 3 seconds:

10 * 3 * 3/2 = 45 meters;

3. Let’s find the movement of the body in the last second:

80 – 45 = 35 meters;

Answer: the movement of the body in the last second is 35 meters.