Momentum and motion

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Intros

Lessons

Introduction to momentum and motion:
- the term "momentum" in everyday usage versus the physics definition
- standard units for momentum calculations

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Examples

Lessons

Finding the Momentum of an Object
1. a 1200 kg car traveling at 20 m/s [E]
2. a 0.25 kg ball thrown upward with a velocity of 30 m/s
3. a stationary truck weighing 2500 kg
momentum = mass ∙ velocity
1. A 45 kg ice skater moving backwards has a momentum of 360 kg∙m/s. What is her velocity?
2. A car travelling at 50 km/h has a momentum of 1.39×10⁴ kg∙m/s. What is its mass?

Topic Notes

In this lesson, we will learn:

the term "momentum" in everyday usage versus the physics definition
standard units for momentum calculations
problem solving with momentum

Notes:

Momentum is the "quantity of motion", and can be thought of as how difficult it is to stop an object in motion.

Momentum

$\vec{p} = m \vec{v}$

$\vec{p}:$ momentum, in kilogram meters per second (kg∙m/s)

$m:$ mass, in kilograms (kg)

$\vec{v}:$ velocity, in meters per second (m/s)

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