Hi!
1 decimeter = 100 millimeters.
Therefore 2 decimeters = 200 millimeters.
A is correct because kinetic energy is energy in motion. The ball is in motion rolling down the hill.
Answer:
<h2>2500 N</h2>
Explanation:
The weight of the object can be found by using the formula

w is the workdone
d is the distance
From the question we have

We have the final answer as
<h3>2500 N</h3>
Hope this helps you