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Transcript

Newton’s Laws Study Guide Name: __________________ Date: ___________________ 1. State Newton’s 1st Law: 2. Which object has more inertia, a train or a beach ball? How do you know? 3. What is the equation to calculate weight? 4. What is the mass of an object that weighs 532N on the moon (g=1.6m/s2)? 5. An object is pushed across the floor with an applied force of 52N to the right while experiencing a frictional force of 15N. What is the net force on the object? 6. What type of motion can an object with a net force of zero experience? 7. What type of motion can an object that has a net force greater than zero experience? 8. The object below is traveling at a constant velocity to the left while experiencing friction. What is the applied force on the object? Fa= ______ Ff= 35N 9. Newton’s 2nd Law can be represented with the equation F=ma. What happens to the acceleration of an object if the mass of the object increases? (Assume net force remains constant) 10. What is Newton’s 3rd Law? 11. A 10kg box is pushed across the floor with an acceleration of 5m/s2 for 0.5s. What net force on the box produced this motion? What is the weight of the box? 12. List the proper SI units for the following variables: Force: Weight: Mass: Gravity: Acceleration: 13. Why do weight and force have the same units? 14. A. Define normal force and draw a free body diagram for a book resting on a table (label the forces). B. Why do we say that the book is in equilibrium? 15. State Newton’s 2nd Law: 16. Solve each unknown in the following diagram. Fn= _______ FF= 23N Fa= 52N Fg= 65N Acceleration of object= ________ Mass of the object= _______ Net Force on the object= ________ 17. Draw a free body diagram for a block on an inclined plane that is at rest. What force is responsible for keeping it at rest and which direction does it act? 18. What is terminal velocity? 19. What is the resultant of the following two component vectors? 20. What is the net force acting on a 2kg object that experiences the motion shown in the graph between B and C? 21. What is the upward force in the diagram below? If the magnitude of Fa is greater than the magnitude of Ff, what type of motion would this object experience? 22. Acceleration is (directly, inversely) proportional to net force and (directly, inversely) proportional to the mass of an object. 23. How can a rocket or balloon propel itself forward when it is not in contact with any other objects? 24. A 4.5x102kg object accelerates from 5m/s to 15m/s in 3s. What is the magnitude of the net force on the object? 25. What is the mass of the object represented in the following graph? 26. A bug hits a windshield with a force of 63N. What is the magnitude of the force exerted by the windshield on the bug? 27. What is the rate that all freely falling objects accelerate at when falling on Earth? 28. How long does it take an object to fall a distance of 5m from rest on Earth? 29. An object falls for 10 seconds. What was the height from which it was dropped? What is the object’s speed when it hits the ground? 30. How can you determine the direction of the force of friction when creating a free body diagram?