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Agenda Jeopardy Review Game • Teams of 4 • Each team will have one representative at a time come to the table to play. • You must wait for the ENTIRE question to be read before you can buzz in. • If you get the question correct you get points, wrong and you lose the points. • No talking during answer session – your team will lose points if you talk. Science – Day 5 Objective: • Today you will review the concept of forces and how they affect the motion of an object HOMEWORK: • Chapter 10 TEST – THURSDAY, December 22nd . • NO Study Island this week. • Vector Posters due Thursday Notes… Have out the following: • Everything off of your tables. Forces - Jeopardy Forces Forces 2 Vocabulary Formula Friction $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 Final Jeopardy Forces 1 - $100 • The attractive force between all objects in the universe. • GRAVITY Forces 1 - $200 When the forces are opposite in direction but equal in strength. Balanced Forces Forces 1 - $300 This is the metric unit of measurement used for force. newton (N) Forces 1 - $400 When the only force acting downward on an object is gravity, the object is said to be in… Freefall Forces 1 - $500 The Universal Law of Gravity states all objects in the universe are attracted to each other. The amount of the force depends on these 2 factors: 1. the mass of the object 2. the distance between them Forces 2 - $100 Forces that are opposite in direction and NOT equal in strength. Unbalanced Forces Forces 2 - $200 The total of all the forces involved when direction is taken into account is called this Net force Forces 2 - $300 A skydiver will reach terminal velocity around what speed (in m.p.h) 118 m.p.h – 120 m.p.h Forces 2 - $400 This is a physical quantity that describes both the strength and direction of a force. vector Forces 2 - $500 An object on Earth falls off of a cliff. Assume there is no air resistance. What will the speed of the object be 3 seconds into the fall? 29.4 m/s Vocabulary - $100 A push or a pull, or any action that has the ability to change motion. force Vocabulary - $200 This measures the amount of gravitational force on an object? weight Vocabulary - $300 This type of friction occurs between a skateboard and a road. Rolling friction Vocabulary - $400 The greatest velocity a falling object reaches while in freefall is called this. Terminal velocity Vocabulary - $500 What term do we use to refer to a object that has been thrown. Projectile Formula - $100 If gravity suddenly doubled then your weight would double – what happens to your mass? Mass would stay the same. Formula - $200 What is the equation used to determine weight if you are given the mass and gravitational strength? W = mg Formula - $300 What is the unit of measurement used for mass? Kilogram (kg) Formula - $400 What is the strength of gravity on Earth? 9.8 N/kg Formula - $500 What is the conversion to go from pounds to Newtons ? Multiply pounds by 4.448 Friction - $100 What 1. 2. 3. 4. are the four types of friction? static sliding rolling fluid Friction - $200 When you sit in front of a fan you can feel a breeze caused by this type of friction. Fluid Friction Friction - $300 The friction that acts between surfaces that are not in motion is called this. Static friction Friction - $400 Air resistance is not the same for all objects, these two factors can play a role in the amount of air resistance an object experiences. Surface area Speed (velocity) Friction - $500 The strength of the force of friction present depends on these 2 factors: 1. how hard the surfaces push together 2. the types of surface involved. Final Jeopardy An object on Saturn falls off a cliff and after 2 seconds reaches a speed of 20.88 m/s - assume there is no air resistance. What is the gravity on Saturn? 10.44 N/kg