• #### Subject, Predicate and Objects

##### English›Grammar›Sentence Basics
Identify the subject, predicate, and objects in a sentence.
• #### Components of a Force - Problem 3

##### Math›Precalculus›Vectors and Parametric Equations
How to use the component of an object's weight parallel to the surface of an inclined plane to find the weight of the object.
• #### Momentum

##### Science›Physics›Energy and Momentum
Understanding an object's momentum.
• #### Toppling and Stability

##### Science›Physics›Gravitation
Understanding the stability of an object.
• #### Acceleration

##### Science›Physics›Linear and Projectile Motion
Understanding the acceleration of an object.
• #### Indirect Measurement - Concept

##### Math›Geometry›Similarity
How to use similar triangles to measure the height of objects.
• #### Center of Mass

##### Science›Physics›Gravitation
Finding an object's center of mass.
• #### Indirect Measurement - Problem 1

##### Math›Geometry›Similarity
How to use a mirror and similar triangles to find the height of an object.
• #### Permutations - Problem 4

##### Math›Algebra 2›Combinatorics
How to calculate the number of different ways to line up objects when alternation is required.
• #### Arithmetic Series - Problem 8

##### Math›Precalculus›Sequences and Series
How many total cans (or objects) in a stacked display?
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• #### Pronoun Case

##### English›Grammar›Sentence Basics
The definition and examples of pronoun case.

• #### Flotation

##### Science›Physics›Solids, Liquids and Gases
How the mass of a floating object is related to its buoyant force.
• #### The Quadratic Formula - Problem 6

Using the quadratic formula to determine when an object will hit the ground.
Tags:
• #### Permutations - Problem 4

##### Math›Precalculus›Topics in Discrete Math
How to calculate the number of different ways to line up objects when alternation is required.
• #### Archimedes Principle

##### Science›Physics›Solids, Liquids and Gases
How to find buoyant force for floating and submerged objects.
• #### Area of Circles - Problem 3

##### Math›Geometry›Area
How to calculate the area in a problem where a rope or leash is tied to an object.
• #### Average Velocity - Concept

##### Math›Calculus›The Derivative
How to compute the average velocity of an object moving in one dimension.
• #### Arithmetic Series - Problem 8

##### Math›Algebra 2›Sequences and Series
How many total cans (or objects) in a stacked display?
Tags:
• #### Free Fall

##### Science›Physics›Linear and Projectile Motion
Understanding the behavior of an object in free fall.