PPT-Chapter 7: Impulse and Momentum

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 . Lots of fun!. Win . valuable prizes!. 1.The reason padded dashboards are used in cars is that they . look nice and feel good. . decrease the impulse in a collision. . increase the force of impact in a collision. . 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.. 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).. 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. s. Compare the inertia of a semi truck and a roller skate… . Will the truck always have more inertia than the roller skate? . Will it always have more momentum than the roller skate?. Warm-Up. Estimate the amount of work the engine performed on a 1200-kg car as it accelerated at 1.2 m/s. 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 . AP Physics 1. M. Dimler. What to Expect from this Unit. Momentum. Impulse. Impulse-Momentum Theorem. Conservation of Momentum. Collisions (Elastic, Inelastic, Perfectly Inelastic, and Explosion). Elastic Collisions-Conservation of KE. Work Energy and Momentum Physics Unit 3 This Slideshow was developed to accompany the textbook OpenStax Physics Available for free at https:// openstaxcollege.org/textbooks/college-physics By OpenStax You can calculate the momentum of a particle and the impulse of a force. The momentum of a body of mass . m. which is moving with velocity . v. is given by . mv. If the mass is in kg and the velocity is in ms. 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. .