9. An object accelerates. 5.0 m/s2 when a force of 20.0 newtons is applied to it.
What is the mass of the object?

m = 4.00 kg

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right  

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Physics

Newton's Law of Motions

Newton's 1st Law of Motion: An object at rest remains at rest and an object in motion stays in motion Newton's 2nd Law of Motion: F = ma (Force is equal to [constant] mass times acceleration) Newton's 3rd Law of Motion: For every action, there is an equal and opposite reaction Step-by-step explanation:

Step 1: Define

[Given] F = 20.0 N

[Given] a = 5.0 m/s²

[Solve] Mass m

Step 2: Solve for m

Substitute in variables [Newton's 2nd Law of Motion]:                               20.0 N = m(5.0 m/s²)[Division Property of Equality] Divide 5.0 on both sides:                            4.00 kg = mRewrite:                                                                                                           m = 4.00 kg

The answer is 16.64 feetyour welcome