October 18, 2021

# Energy

## Springs

We return to Hooke’s Law for the restoring force of a spring. Elastic potential energy is stored in a stretched spring. When a mass on a spring oscillates energy is being converted back and forth between kinetic and potential energy.

## Power Sources

Focused on the generation of electricity and different sources. Links to simulations are included.

## Power

Power is the rate at which work is done.

## Work & Energy

More on Work, Energy & Power, but especially the Work-Energy Theorem.

## Mechanical Energy

Kinetic Energy, Potential Energy, Total Mechanical Energy & Energy Conservation.

# Momentum

## Collisions

Totally inelastic collisions, elastic collisions and kinetic energy.

## Momentum Basics

Momentum, Force, Impulse and Conservation of Momentum.

# Newton’s Laws

## Force problems

The tension in the rope depends upon the acceleration of the suspended bucket.

## Laws 1, 2 & 3

Inertia, F = ma, and equal but opposite.

# Two-Dimensional Motion

## Projectile Motion Calculations

When the initial velocity is at an angle to the horizontal. These computations were in preparation for the Projectile Motion lab.

## Parabolic Form, V0 Horizontal

When the initial velocity has only a horizontal component. These computations were in preparation for the Galileo’s Ramp and Hit the Target Lab.

## Projectile Motion

When the initial velocity has horizontal and vertical components.

## Part I

Combining Vertical & Horizontal Motion

## Vectors

Notes on vectors …

… and a few applications that are useful for thinking about problems.

## More Motion Graphs

• Focusing on weak points from the quiz …
• Slope or area under the curve? Use dimensional analysis!
• Sketching motion graphs.

## Review for Quiz 2

• Time-independent equation.
• Motion graphs.

## Motion Graphs

• The change in position is the area under the velocity-time curve.
• The change in the velocity is the area under the acceleration-time curve.
• The equations of motion for constant acceleration are derived using only the area under the curve. (1/2)at2 is explained!

## Time Independent Equation

Algebraic derivation with examples.

## 1D Kinematics Review

In preparation for upcoming quizzes and tests.

## Velocity & Acceleration 