Jeopardy First LawSecondThird Action/ Reaction Rockets Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 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