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2. Zoe Seda Adrian Defante Tiffaney Mathis
Force & Motion
Zoe Seda
Adrian Defante
Tiffaney Mathis

3. Standard 2, Strand 3
…knows that the more massive an object is, the less effect the same force has on it.

4. What makes an object massive?
If the object has a lot of mass
What is mass?
It is the amount or measure of matter an object has
Mass: How much matter an object contains, it is not the same as weight, although an objects mass does help determine how much it will weigh.
What is matter?
Matter is everywhere. Matter is everything made of atoms and molecules. Matter is anything that has mass and takes up space .

5. What makes an object massive?
If the object has a lot of mass
A LOT OF MASS
Slightly Massive
Very Little Mass

6. What is mass? It is the amount or measure of matter an object has
Sample of Matter
Here a mass balance can be used to compare the amount of matter these different objects have.
A LOT OF MASS
Slightly Massive
Little Mass

7. What is matter?
Matter is everywhere. Matter is everything made of atoms and molecules. Matter is anything that has mass and takes up space .
We have to be careful here in being able to explain to the students, the difference between weight and mass. Weight is a force. It is the gravitational effect of the how the force of gravity pulls down on the matter inside an object. Weight is often used interchangeably with mass. There are subtle differences between the two though.
Mass takes up space
Weight tells how strong gravity acts on that space
Ex: Balances are used to measure mass: If there was not a gravitational force on an object you placed a very dense object on one side and counterbalanced with a larger less dense object that balanced both objects, that would be equivalent to saying they have the same mass. If you were able to condense the larger less dense object down to the smaller one, they would essentially are taking up the same space and therefore have the same mass.
However with gravity acting, the two objects of different densities and sizes may not have the same weight.

8. Feel it, See it Experiments
Understanding size effects on forces
By physically feeling how it happens
Mathematically seeing how it happens
Experimentally determining how and if it
happens
Attempt to have children feel the concepts and then understand it through math

9. Activity 1: The Nudge Effect:
In this activity, the students will see and feel that the more massive an object is, the less effect the same force has on a more massive object
Materials:
6 students if done as a class demonstration OR groups of 6 students if the entire class participates
Ruler
Feeling the Force

10. Activity 1: The Nudge Effect
Instructions
Select 6 students.
Have one student be the “Nudger” and select another student to be the receiver.
Stand them 2 feet apart.
Have the “Nudger” give the receiver a nudge.
Notice the effect the nudge has on the receiver.
Stand the “Nudger” at the original spot.
Stand the other 5 students 2 feet from the “Nudger.” Have these 5 students lock arms and huddle. These five students have become one larger receiver.
Have the “Nudger” give the more massive receiver a nudge with the same force as the previous nudge.
Observe the result of the nudge.

11. The “Nudger” with one receiver
The force the “nudger” exerts is enough to move the receiver.

12. The “Nudger” with a massive receiver
The force the “nudger” does not move the larger receiver.

13. Activity 2: Math/Excel Worksheet:
Show the students mathematically how it works
Focus for the students on the results and not necessarily the cumbersome math
Using F=m*a

14. Activity 3: Finding out if its true:
Experiment to gather data and see how math plays a role in this concept
Again, focus for the students on the results and not necessarily the cumbersome math
Ability to see how scientists test things out
Measuring Acceleration

15. References http://science.howstuffworks.com/fpte.htm