0.022 has 2 digits because you would count from the left starting with the first nonzero number
Since unbalanced forces acts on the spheres, the aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.
<h3>What is an experiment?</h3>
An experiment is a study whose objective is to study cause and effect relationships. In this case, the students had to increase the distance at which the spheres was released.
The aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.
Learn more about experiments: brainly.com/question/11256472
Answer:
Acceleration is 
Solution:
As per the question:
Radius of the circle, R = 1.8 m
Height above the ground, h = 1.8 m
Horizontal distance, x = 9.9 m
Now,
The magnitude of the centripetal acceleration can be calculated as:
where
v = velocity
R = radius
= centripetal acceleration
Now, if we consider the vertical component of motion only, then considering the initial velocity, 'u' = 0, from kinematic eqn:

t = 0.606 s
Now, for the horizontal component of velocity:
x = vt


Now, we know that the centripetal acceleration is given by:
A person running down a hill is the answer to this