Notice the difference in mass of each object. The book has the most mass and the napkin has the least. NGSS Standards: Motion and Forces: The motion of an object is determined by the sum of the forces acting on it; if the total force on the object is not zero, its motion will change.
The greater the mass of the object, the greater the force needed to achieve the same change in motion. For any given object, a larger force causes a larger change in motion. A: Forces and motion: The role of the mass of an object must be qualitatively accounted for in any change of motion due to the application of a force. Grades Attached File s :. Related Activities. Modeling Clogged Arteries. Bagging Groceries. Getting yourself to go out for a jog as soon as you get home from work, instead of plopping down on the couch, requires that you overcome inertia.
If you want to start getting up half an hour earlier in order to start a writing practice, you have to overcome inertia. Change takes place as a result of the disruption. Secure Short Term Wins to Overcome Inertia Produce enough short term wins—that is, quick wins—to energize the change and create momentum. Here are two ideas: Deny yourself a treat, such as your morning cup of coffee, unless you take action toward your goal.
Charge yourself for every day that you fail to take action. Drink some water. Eat a nutritious, healthy snack. Do some yoga to get your energy flowing. The only items on your desk are your laptop, a notebook and a pen, a lamp, your phone, and a three-stack paper organizer. You immediately open the bottom desk drawer on the right, and you see all of your client files neatly filed and labeled. You quickly find the one that you need, you open it, you find the document your client is asking about, and you answer her question.
You put the file right back where it belongs. You get to work on your computer and you realize that you need to look up a technical term. You turn around and see all of your reference books stacked on a shelf behind your chair, within easy reach. You find the term you need and put the book back. You then need the stapler. You open the top desk drawer and see all of the supplies that you use on a regular basis. Stage It Set the stage for the action that you want to take.
Comments on this entry are closed. Extrapolating to a frictionless surface, we can imagine the object sliding in a straight line indefinitely. The object would not slow down at all if friction were completely eliminated.
Consider an air hockey table. When the air is turned off, the puck slides only a short distance before friction slows it to a stop. However, when the air is turned on, it creates a nearly frictionless surface, and the puck glides long distances without slowing down. Additionally, if we know enough about the friction, we can accurately predict how quickly the object will slow down. Friction is an external force. Experiments have thoroughly verified that any change in velocity speed or direction must be caused by an external force.
The idea of generally applicable or universal laws is important not only here—it is a basic feature of all laws of physics. Identifying these laws is like recognizing patterns in nature from which further patterns can be discovered.
The property of a body to remain at rest or to remain in motion with constant velocity is called inertia. As we know from experience, some objects have more inertia than others. It is obviously more difficult to change the motion of a large boulder than that of a basketball, for example.
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