Name:    Chapter 12 -- Force & Newton's Laws of Motion #2

 CompletionComplete each statement. 1. Mass times velocity equals ____________________. 2. The tendency of an object at rest to remain at rest, or if moving, to continue moving at a constant velocity is ____________________. 3. An object with a small mass has ____________________ inertia than an object with a large mass. 4. The motion of an object resulting from only the force of gravity is ____________________. 5. According to the universal gravitation equation, the gravitational force between two objects decreases as ________________________________________ increases. 6. A situation known as ___________________________________ occurs when astronauts and their surroundings all accelerate at the same rate. 7. When throwing a dart at a target, you should always aim ____________________ the bull’s eye. 8. When you stand, your weight pushes down on the ground and the ground pushes back with a force equal to your weight ___________________________________. 9. Newton’s ____________________ law tells us how much an object’s speed will be increased or decreased by an unbalanced force. 10. Mass is a measure of the amount of ____________________ in an object. 11. If the distance between two objects is quadrupled, the gravitational force between them _________________________ its original value. 12. When two billiard balls collide, the total change in momentum of the balls is ____________________. 13. The total momentum of objects before a collision ____________________ the total momentum of the objects after a collision. 14. In space, an astronaut hammers a nail. The hammer moves in one direction and the astronaut moves ___________________________________. 15. An example of an action-reaction pair is the action force when you jump down onto a trampoline, your weight pushes down on the surface and the reaction force when the trampoline pushes back up on you with a force ___________________________________. 16. When the same amount of force is applied to two different masses, the smaller mass will be accelerated ____________________ than the larger mass. 17. When the same force is applied to two different masses, these masses will have ____________________ accelerations. 18. The ____________________ of an object remains constant while its ____________________ varies according to the gravitational force it experiences. 19. When you kick a stone, your foot exerts a force on the stone, and the stone exerts a force ____________________ in size and ____________________ in direction on your foot. 20. Orbital motion is a combination of ____________________ motion and freefall. 21. An important safety feature in your car that is based on the concept of inertia is the ____________________. 22. The gravitational force on an object ____________________ as the object’s mass increases. 23. The path of a pitched ball is an example of ____________________ motion. 24. An object changes its motion only if a force acts on it to change its speed or direction. This is a statement of Newton’s ____________________. 25. Action and reaction forces always occur at the ____________________ time. 26. According to Newton’s second law of motion, force is the product of ____________________ and _________________________. 27. Free fall is the motion of an object resulting from ___________________________________. 28. The value for the acceleration of objects in free fall near Earth is ____________________. 29. When gravitational forces and air resistance equalize on an object that is falling toward Earth and the object stops accelerating, its velocity is called the ____________________ velocity. 30. An object at rest remains at rest unless it experiences a(n) ______________________________. 31. If the car you are riding in comes to a sudden stop, _________________________ helps stop your forward motion. 32. When a satellite orbits Earth, it experiences two motions: ____________________ motion and ____________________ toward Earth. 33. All ____________________ objects have momentum. 34. As the time period of an object’s momentum change becomes longer, the force needed to cause this change becomes ____________________.