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Jeopardy First Law Second Third Action/ Reaction Rockets Q $100 Q $100 Q $100 Q $100 Q $100 Q $200 Q $200 Q $200 Q $200 Q $200 Q $300 Q $300 Q $300 Q $300 Q $300 Q $400 Q $400 Q $400 Q $400 Q $400 Q $500 Q $500 Q $500 Q $500 Q $500 Final Jeopardy $100 Question from H1 What will cause an object to move? $100 Answer from H1 An unbalanced force $200 Question from H1 If an object is already moving, in the absence of outside forces, what will the object do? $200 Answer from H1 It will continue moving with the same velocity $300 Question from H1 On Earth what are unbalanced forces that often change an objects motion? $300 Answer from H1 Gravity and friction $400 Question from H1 What 2 factors affect acceleration? $400 Answer from H1 Force and mass $500 Question from H1 What is Newton’s First Law of Motion also called? $500 Answer from H1 The Law of Inertia $100 Question from H2 What happens to passengers on a train When it stops quickly? $100 Answer from H2 They want to keep moving $200 Question from H2 What is inertia? $200 Answer from H2 An object’s tendency to resist a change in motion $300 Question from H2 How can I increase acceleration of a sled? $300 Answer from H2 Answers will vary $400 Question from H2 A measure of an object’s _______, is a measure of the object’s inertia. $400 Answer from H2 motion $500 Question from H2 What is the force required for the following Circumstances? A water-skier with a mass of 55kg who is accelerating at a rate of 2.0m/s² $500 Answer from H2 110 newton’s $100 Question from H3 For every action there is what? $100 Answer from H3 An equal but opposite reaction $200 Question from H3 What is the force exerted by a baseball compared to the force exerted by a bat used to hit it? $200 Answer from H3 It is equal to the force exerted by the bat $300 Question from H3 The force that causes an object to move in a circle is called what? $300 Answer from H3 Centripetal force $400 Question from H3 For every action force there is a what? $400 Answer from H3 Reaction force $500 Question from H3 When a gymnast does a flip, he pushes down on the vaulting horse. What is the reaction force here? $500 Answer from H3 The vaulting horse pushing him back $100 Question from H4 When you jump Your feet pushing on the ground is what kind of force? $100 Answer from H4 An action force $200 Question from H4 When you jump what is the reaction force? $200 Answer from H4 The ground pushing back on your feet $300 Question from H4 Why don’t action-reaction forces cancel each other out? $300 Answer from H4 They are acting on different objects $400 Question from H4 What are the main forces acting on passengers during a roller coaster ride? $400 Answer from H4 Gravity and acceleration $500 Question from H4 How do you determine momentum of a moving object? $500 Answer from H4 By multiplying the objects mass and velocity $100 Question from H5 The law of conservation of momentum states that the total momentum of objects that interact does what? $100 Answer from H5 Does not change $200 Question from H5 What must you know to determine an objects momentum? $200 Answer from H5 It’s mass and velocity $300 Question from H5 Why can a rocket take-off? $300 Answer from H5 Because the gases it expels with a downward action force exert an equal but opposite reaction force on the rocket $400 Question from H5 Satellites in orbit around Earth continuously do what? $400 Answer from H5 Fall toward Earth $500 Question from H5 How does gravity help keep satellites in orbit? $500 Answer from H5 Gravity provides the centripetal force Final Jeopardy Does a satellite require fuel once it is in orbit? Why? Final Jeopardy Answer No, Inertia and the force of gravity keep the satellite in orbit