Question

What is the difference in

momentum between an 87.2 kg
football player running 2.87 m/s and
a 0.0520 kg bullet moving 789 m/s?

Answer 1

209.236

Step-by-step explanation:

Order of Operations: PEMDAS

"Please excuse my dear Aunt Sally"

Parentheses, exponents, multiplication, division, addition and subtraction

First use p=mv

Player:(plug in the data)

= 87.2*2.87

= 250.264

Bullet : (do the same)

Then subtract Bullet-Player =209.236

Answer 2

209.236 kg · m/s

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Physics

Momentum

Momentum Formula: P = mv

• P is momentum (in kg · m/s)
• m is mass (in kg)
• v is velocity (in m/s)

Step-by-step explanation:

Step 1: Define

m₁ = 87.2 kg

v₁ = 2.87 m/s

m₂ = 0.0520 kg

v₂ = 789 m/s

Step 2: Find Momentums

Football Player

1. Substitute [MF]: P = (87.2 kg)(2.87 m/s)
2. Multiply: P = 250.264 kg · m/s

Bullet

1. Substitute [MF]: P = (0.0520 kg)(789 m/s)
2. Multiply: P = 41.028 kg · m/s

Step 3: Find difference

1. Define equation: P₁ - P₂
2. Substitute: 250.264 kg · m/s - 41.028 kg · m/s
3. Subtract: 209.236 kg · m/s