PPT-Impulse and Changes in Momentum: Crumple Zone

Chapter 3 Section 7 Date HW PTG 18 pg 332 Learning Objective Explain collisions in terms of Newtons Laws momentum and impulse Success Criteria Define impulse Explain conservation of momentum. Crumple Zones are designed to absorb the kinetic energy from impact during an accident by controlled deformation Usually crumple zones are found in the front part of a vehicle in order to absorb the impact of a head on collision though they can also Dynamics. Crumple Zones. A crumple zone is the zone of an object that absorbs energy upon impact. The purpose of the crumple zone is to increase the amount of time it takes an object to come to rest.. Crumple Zone Lab. Define the Problem:. Develop impulse - momentum theorem. Investigate applications of impulse in design (safety, sports, etc.). Discuss causes of injury in accidents. Bring in industry experts if possible.. We will now quantify exactly how it hits the fan.. Momentum. Momentum = product of mass X velocity. Symbol for momentum is “p” (don’t ask me why). So, p = . mv. Momentum is also a vector and points in the direction of velocity. Chapter 7. 7.1 The Impulse-Momentum Theorem. This section deals with time-varying forces affecting the motion of objects. . The effects of these forces will be discussed using the concepts of . i. mpulse and linear momentum.. https://. www.youtube.com/watch?v=hTZI-kpppuw. A truck rolling down a hill has more momentum than a roller skate with the same speed. But if the truck is at rest and the roller skate moves, then the skate has more momentum. Moving objects can have a large momentum if it has a large mass, a high speed or both.. Pg. 222- 227. Momentum & Impulse. The driver of this race car walked away from the car without a scratch. Luck had little to do with this fortunate outcome though – a practical application of Newton’s laws of motion by the engineers who designed the car and its safety equipment protected the driver from injury. Have you ever wondered…. How a tae kwon do expert can break a stack of cement blocks?. Why falling on a cement floor hurts more than falling on the grass?. Why a follow through is important in golf, baseball or boxing?. Excerpts . from . Chapters 9 and 11. Impulse and Momentum. Newton’s . 2nd. Law of motion can be rewritten by using the definition of . acceleration. as the change in . velocity. over the change in time.. You’re Quite Impulsive. A Review of What We Know About Motion. Chapters 2 & 3 introduced us to vectors such as displacement, velocity, and . acceleraton. No mass was included. Chapter 4 introduced forces and mass into the mix. and . Collisions. Momentum. Impulse. Impulse-Momentum . theorem. Conservation of . linear momentum. Collisions. Momentum. , p. The linear momentum . p. of an object is the product of the object’s mass . What factors affected how fast objects move after a collision? (Think of your lab). Section 1: Momentum and . Impulse. Linear Momentum:. Momentum is defined as . mass times velocity. .. Momentum is represented by the symbol p, and is a . Momentum. Measures how hard it is to stop a moving object.. Momentum can be defined as . "mass in motion.". . All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion. . Impulse and momentum. There are many situations in which the force acting on an object is not constant.. The force varies with time. Impulse and momentum. To describe how a . time varying force . affects the motion of an object, we need to use .