Answer:
2
Step-by-step explanation:
negative numbers dividing with negative have positive quotients
Answer: 
Step-by-step explanation:
This is a multiplication problem. You are multiplying
by 4. This also means 4 divided by 3. They are both the same.
The acceleration of the bookshelf is equal to 1.30 
<u>Given the following data:</u>
- Mass of bookshelf = 51.5 kilogram
To determine the acceleration of the bookshelf, we would apply Newton's Second Law of Motion:
Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on the object while being inversely proportional to its mass.
Mathematically, Newton's Second Law of Motion is given by this formula;

Substituting the given parameters into the formula, we have;

Acceleration = 1.30 
Read more on net force here: brainly.com/question/1121817