A rolling ball moves from 8.4 cm to 4.2 cm during the time from 3.0 s to 6.1 s. What is its average velocity over this time interval?

The average velocity of the ball is 1.355 cm/s.

Explanation:

Given;

initial displacement of the ball, x₁ = 8.4 cm

final displacement of the ball, x₂ = 4.2 cm

initial time, t₁ = 3.0 s

final time, t₂ = 6.1 s

The average velocity of the ball is calculated as;

Therefore, the average velocity of the ball is 1.355 cm/s.

massxgravity x heght=weightxheight= pe

4900=490xh

h=10