MODULE 2

• The purpose of this module is to help you understand the concept of momentum and impulse and their relationship. It will also provide you with an understanding of the effect of the collision on objects, and how the momentum is conserved before, during, and after the collision.
• Lessons in this module

  • Lesson 1 - Momentum and Impulse
  • Lesson 2 - Conservation of Momentum
• After going through this module, you are expected to

  • Relate impulse and momentum to collision of objects (e.g., vehicular collision) and infer that the total momentum before and after collision is equal.
• Specifically, you should be able to

  • Analyze the factors that affect momentum
  • Solve problems using the concept of impulse and momentum
  • Apply the momentum and impulse to real-life scenarios
  • Apply the law of conservation of momentum to real-life situations
  • Distinguish between elastic and inelastic collisions
• Momentum is the product of a body's mass and velocity.
• Impulse is the force multiplied by the time it was applied, which results in a change in the object's momentum.
• Objects with greater momentum require a longer time or an equal or greater force to stop.
• TASTE • EXCELLENCE


  Qualities emphasized
• ROAD SAFETY REMINDER. Create your road safety reminder about speed limits or safety precautions prescribed on the nearest road in your home. You may present your work through a poster, an infographic, a brochure, or a video clip. Follow the rubrics in making your output.
• Rubrics for scoring


  • Content (10 pts) Accurate and detailed information is provided.
  • Organization (5 pts) Information are systematically organized, and it is easy for the reader to understand.
  • Visual Appeal (5 pts) Letter, colors, images, layouts, and other visual elements help in the expressing overall idea of your output.
  • Citation (5 pts). All sources of information are cited using APA style.
• Put the word TRUE if the statement is correct and FALSE if it is not.
• 1. Momentum is possessed by all objects.
• 2. Impulse is always equal to the change in momentum.
• 3. A sumo wrestler at rest has greater momentum than a gliding ice skater.
• 4. A truck can still change its momentum if minimal force will be applied over a long period of time.
• 5. During a jump shot, bending your knees as you land helps you decrease the impact force.
• Solve the problem.


  1. Situation: A car with a mass of 1 892kg, traveling at 12m/s, was heading towards a wall. It applied 70N of force on its brakes for 6 seconds until it slows down.

  2. Find: 1. The momentum of the car.

  3. The resulting impulse of the car.
• Recall the concept of momentum and impulse and answer the questions that follow.
• Momentum


  The quantity of motion possessed by a moving object
• Impulse


  The change in momentum of an object
• 1.Which ball has greater momentum?
• 2.Which ball will be harder to stop? Why?
• Activity 2.1 Magic Marbles


  1. Objective: Infer that the total momentum before and after a collision is equal.

  2. You will need: 10 marbles & carton

  3. What you will do: 1. Cut a rectangular shape out of the carton. The height should be at least 1 foot.

  4. Peel one layer of the carton to expose the corrugated part and fold one side to make an inclined plane.

  5. Align 10 marbles on top of one of the tracks, make sure they all touch each other.

  6. Put one marble on the inclined part and release it. Make sure that it will hit the other marbles. Observe what happens.

  7. Do the activity again, this time, take 2 marbles on the incline and let it roll. Observe what happens.
• Law of Conservation of Momentum


  The momentum of an object will remain the same if there is no external force that will act on the system
• The activity presents an example of how the momentum of a rolling marble is transferred to another marble after the collision. This activity demonstrates the Law of Conservation of Momentum which states that the momentum of an object will remain the same if there is no external force that will act on the system.
• The momentum of the marble before the collision is equal to the momentum of the marble after the collision.
• Collisions


  1. The momentum of moving objects is always conserved before, during, and after collisions.

  2. Types of Collisions: Elastic collisions - The two objects experience a rebound. No deformation or generation of heat will occur since the objects separate after the collision.

  3. Inelastic collisions - These types of collisions commonly result in deformation or the generation of heat. The object sticks together after collision and moves with same velocity.
• Study and analyze the figure below and answer the questions that follow.
• What will be the velocity of ball B after, if: a. the collision is perfectly elastic? b. the collision is perfectly inelastic?
• Apply the concept of the "Law of Conservation of Momentum" to explain the given applications. 1. Professional billiard players like Efren "Bata" Reyes apply the law of conservation of momentum in playing billiards. Using the Law of Conservation of Momentum, how do you think billiard players strategize their gameplay?
• 40 300 kg●m/s


  Momentum of car A and B after collision
• 3 200kg


  Mass of car A and B
• Figure 9. A firing pistol
• Since the computed value is positive therefore, the two cars moved in the direction of Car A.
• Figure 10. Collision of balls with equal masses
• Professional billiard players like Efren "Bata" Reyes apply the law of conservation of momentum in playing billiards.
• During a firing demo, the firing instructor usually teaches the trainees of the proper posture in holding a gun.
• Why is it necessary to follow the correct position when firing a gun? Support your answer using the Law of Conservation of Momentum.
• Concept Map terms

  • Elastic collision
  • Inelastic collision
  • Recoil
  • Sticks after collision
  • Deformation
  • Generation of heat
  • Direction
  • Separates after collision
  • Law of Conservation of Momentum
• Heat and deformation are results of elastic collisions.