PPT-Impulse and Momentum

Chapter 7 71 The ImpulseMomentum Theorem This section deals with timevarying forces affecting the motion of objects The effects of these forces will be discussed using the concepts of i mpulse and linear momentum. 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. Physics 7. th. edition. Classroom Response System Questions. Chapter 7 Impulse and Momentum. Interactive Lecture Questions. . 7.1.1. An astronaut drops a golf ball that is initially at rest from a cliff on the surface of the moon. The ball falls freely under the influence of gravity. Which one of the following statements is true concerning the ball as it falls? Neglect any frictional effects.. - Class . 14. Today:. Momentum and Impulse. Conservation of Momentum. Collisions, Explosions. Pre-class Reading Quiz. (Chapter. 9). Last day I asked at the end of class:. Consider . a car accident in which a car, initially traveling at 50 km/hr, collides with a large, massive bridge support.. 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. IMPULSE AND MOMENTUM. I. IMPULSE. A baseball hits a bat.. The velocity of the bat changed. (Vf-Vi). The velocity of the ball changed. (Vf-Vi). Vi. Vf. Vi. Vf. B. NEWTON’S 3. rd. Law. For every action (ball hitting bat), there is an equal and opposite reaction (bat hitting ball).. 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. 9. Kinetics. 2. Projekt: Cizí . jazyky v . kinantropologii. - . CZ.1.07/2.2.00/15.0199. Daniel . Jandačka. , PhD.. Impulse of Force. Impulse of force . is the product of the resultant force . Σ. 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 .