### Momentum and Collisions

A Concept-Builder is an interactive questioning module that presents learners with carefully crafted questions that target various aspects of a concept. Each Concept Builder focuses the learner's attention upon a discrete learning outcome. Questions target that outcome from a variety of angles using multiple difficulty levels or varying activities. The following Concept Builders target concepts associated with Momentum and Collisions.

Momentum

Learning Goal:  To use an understanding of momentum as a vector whose magnitude is the product of mass times velocity in order to predict how momentum will change, to rank the momentum of three different objects, and to identify the direction of the momentum vector.

Learning Goal:  To identify a set of impulse parameters that would change an object’s momentum from an initial to a final amount.

Case Studies: Impulse and Force

Learning Goal:  To use impulse-momentum change theorem to analyze a variety of comparative collisions and predict which collision involves the greatest momentum change, impulse, and force.

Impulse-Momentum Change Table

Learning Goal:  To use the F•∆t = m•∆v equation to mathematically relate the various collision parameters (force, collision time, impulse, momentum change, mass, initial velocity, and final velocity) to one another.

Explosions - Law Enforcement

Learning Goal:  To use an understanding of the law of momentum conservation in order to identify situations that violate the law.

Hit and Stick Collisions - Law Enforcement

Learning Goal:  To use an understanding of the law of momentum conservation in order to identify situations that violate the law.

Keeping Track of Momentum - Hit and Stick Collisions

Learning Goal:  To conduct a momentum analysis of a hit-and-stick collision and to relate the results to the concept of momentum conservation.

Keeping Track of Momentum - Hit and Bounce Collisions

Learning Goal:  To conduct a momentum analysis of a hit-and-bounce collision and to relate the results to the concept of momentum conservation.