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



Completion
Complete 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 ____________________.