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Physics Jeopardy Review for the Mechanical Equilibrium Test By: Craig Rizzi Free Body Diagrams Vectors/Sc Equilibrium? alars Forces 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 Miscellaneous FJ Free Body Diagrams 100 A car is driving at a constant speed down the freeway. Draw a free body diagram. Answer Free Body Diagrams 200 Identify all forces acting on this Hover disc as it moves across the table at a constant speed. Answer Free Body Diagrams 300 A person is pushing a hockey puck across ice at a constant speed. What force vector is missing from the diagram? Direction of Travel Answer Free Body Diagrams 400 A roosterdog is accelerating as he is running away from a roosterdog catcher. Draw an accurate free body diagram of the roosterdog. Answer Free Body Diagrams 500 If the scaffolding weighs 600 N and the paint bucket weights 200 N, how much does Burl weigh? Answer Forces 100 A 20-N force and a 35-N force act on an object in opposite directions. What is the net force on the object? Answer Forces 200 What is the minimum resultant possible when adding a 15-N force to a 25-N force? Answer Forces 300 The weight of a buffalo can be represented by a vector that acts: a. Perpendicular to the ground below the buffalo b. Parallel to the ground c. Straight down d. Weight is not a vector Answer Forces 400 A dictionary (mass 1.0 kilogram) lying on a stationary table exerts a force of 9.8 newtons on the table. The force exerted on the dictionary by the table is how many newtons? Answer Forces 500 What is the resultant vector that describes the overall force on Pikachu? Answer Vectors/Scalars 100 What does a vector quantity have that a scalar quantity does not? Answer Vectors/Scalars 200 Name two examples of vectors and two examples of scalars. Answer Vectors/Scalars 300 Forces in a diagram are represented by the following scale: 1 centimeter equals 5 newtons. To represent a force of 20 newtons, the length of an arrow drawn should be how many centimeters? Answer Vectors/Scalars 400 The diagram below represents a force acting at point P. Which of the following pair of forces could represent the x and y components of this force? Answer Vectors/Scalars 500 If I have a 5 N force acting east on an object and a 12 N force acting north on the same object, what is the resultant force on that object? Answer Equilibrium? 100 If an object is moving at a constant velocity, what type of equilibrium is it in? Answer Equilibrium? 200 Assuming Nellie weighs 400 newtons, what is the reading on each of these two scales? Answer Equilibrium? 300 Danny holds a rooster at rest in his outstretched hand. The force he applies to the rooster is a. equal to the weight of the rooster b. is slightly less than the weight of the rooster c. is slightly more than the weight of the rooster d. is zero, until he drops the rooster Answer Equilibrium? 400 You weigh 300 newtons. When you stand on two bathroom scales, one foot on each scale with weight evenly distributed, how much will each scale read? Answer Equilibrium? 500 Is Mewtwo in equilibrium? If not, in which general direction will he accelerate when the following forces are applied? Answer Miscellaneous 100 What are the horizontal and vertical pieces of a vector called? Answer Miscellaneous 200 What is the overall distance traveled by the clown? Answer Miscellaneous 300 Nellie is hanging from the rope as shown. Which side of the rope is more likely to break? A. The Left B. The Right C. 50/50 Chance of Either One Answer Miscellaneous 400 What is the overall displacement of the clown? Answer Miscellaneous 500 If the weight of the iron block is 500 N, what is the tension in the rope pulling on the crate? Answer Free Body Diagrams 100 Direction of Travel Game Board Free Body Diagrams 200 Game Board Free Body Diagrams 300 Direction of Travel Game Board Free Body Diagrams 400 Direction of Travel Game Board Free Body Diagrams 500 Burl weighs 400 N because everything in this system is balanced. Game Board Forces 100 15 N Game Board Forces 200 10 N Game Board Forces 300 C. (Weight always acts straight down) Game Board Forces 400 9.8 N (since we’re in equilibrium) Game Board Forces 500 12 N north Game Board Vectors/Scalars 100 Direction Game Board Vectors/Scalars 200 Vectors: Velocity & Force Scalars: Time & Temperature Game Board Vectors/Scalars 300 4 cm Game Board Vectors/Scalars 400 Game Board Vectors/Scalars 500 Game Board Equilibrium? 100 Dynamic Equilibrium Game Board Equilibrium? 200 400 N each Game Board Equilibrium? 300 A. Equal to the weight of the rooster Game Board Equilibrium? 400 Each scale reads half your weight, or 150 N Game Board Equilibrium? 500 No, he will accelerate southeast Game Board Miscellaneous 100 Components Game Board Miscellaneous 200 70 meters Game Board Miscellaneous 300 The right side is more likely to break (there is more tension on the right). Game Board Miscellaneous 400 25 meters east Game Board Miscellaneous 500 500 N Game Board Final Jeopardy Category Rapid fire true and false. You need to get at least 4 of these right to earn back your wager. 1. Distance is a vector quantity. 2. An object in dynamic equilibrium is accelerating constantly. 3. A vector acting at an angle can be represented by two component vectors. 4. The net force is a combination of all forces that act on an object. 5. The support force is always directed straight up. 6. Equilibrium occurs when at least the left and right forces are balanced. 7. The number of forces that act on an object in free fall is 1. 1. Distance is a vector quantity. (FALSE) 2. An object in dynamic equilibrium is accelerating constantly. (FALSE) 3. A vector acting at an angle can be represented by two component vectors. (TRUE) 4. The net force is a combination of all forces that act on an object. (TRUE) 5. The support force is always directed straight up. (FALSE) 6. Equilibrium occurs when at least the left and right forces are balanced. (FALSE) 7. The number of forces that act on an object in free fall is 1. (TRUE) Good Luck! Don't forget to finish up your note sheet tonight. If you had any trouble with questions in this review game, look at them again tonight.