this is my comic called water pollution up close. i hope you will read it and enjoy it.

this video represents sir issac newtons first law of motion the law of inetria. this law states that an object of motion will stay in motion unless acted upon by an unbalenced force. also the other way around an object in rest will remain in rest unless acted upon by an unbalenced force.

the pink panther theme song

1 .the light bulb lite up when the washers fell from the motor.

2. if you add more washers the light bulb will light up brighter.

3. when i had 4 washers the light bulb was dim. when i had 5 washers the light bulb was bright. when i had 6 washers the light bulb was brighter than 5 but went out quicker. when i had 7 washers the light bulb was brighter then 6 but went out even quicker.

4. when i added more washers the light bulb got brighter but it went out quicker.

5. the energy the light bulb absorbes comes from the force of gravity pulling on the washers making the motor create electricty and the electricity becomes electirc energy which becomes heat and light energy in the light bulb.

6. the wieght of 4 washers is 1.1 (n) and the distance the 4 washers fell was 1.31 (m) so the work done by gravity is 1.4410. the weight of 5 washers is 1.4 (n) and the distance the 5 washers fell was 1.31 (m) so the work done by gravity is 1.8340. the weight of 6 washers is 1.7 (n) and the distance the 6 washers fell was 1.31 (m) so the work done by gravity is 2.276. the weight of 7 washers is 2.0 (n) and the distance they fell was 1.31 (m) and the work done by gravity is 2.6200.

7. 4 washers weigh less than 7 washers. the more washers the more force of gravity was upon them. the more washers the brighter the light bulb was and the quicker it went out.

8. you could add batteries to make the string go up to the motor fatser. you could drop the washers from a higher place with longer string. you could have mmore washers.

9. steps.

1.gather all materiels.

2. set up pegboard.

3. wrap string around the nail and hold.

4. put 4 washers on the paper clip and then drop wjile somebody pays total attetion to the light bulb.

5. repeat steps 3 and 4 with 5 washers than 6 washers than 7 washers.

6.make a graph for # of washers and what happend to the light bulb.

7. record your observations in your graphs.

8. make a new graph with # of washers, the weight of the washers, the distance the washers fell, and the work done by gravity.

9. weigh 4 washers and record it then weigh 5 washers and recordit then weigh 6 washers and record it then weigh 7 washers and record it.

10. mesure the hieght the washers fell and record it in the graph.

11. caculte the work done by gravity for 4 washers, 5, 6, and 7 washers.

(steps are done)

10. yes you could charge it because the falling washers make electricty in the motor and that electricty went to the light bulb and made the light bulb work and i think it will send energy to the homemade battery and charge it.

7. 

1. you caculate a watt of power by work (n-m)/time (s)

2.  a 100-w light bulb prouduces 100 n-m per second the lightbulb is operating.

3. 1 horsepower is equal to 750w.

4. i think so because 1 battery could not lift a single washer and 3 batteries lifted all 3 washers.

5.when you changed the number of batteries the time it spent to lift thewashers was shorter.

6.on the time graph the line went down from the first dot but on the power graph the line goes up from the first dot.

7. i think you could use more batteries or a more powerful motor.

8. yes the motor did use 4.25 because the batteries died quicker but if the batteries are in parrel form they will last longer but prouduce less energy.

our every day life definition of work is something we do to make a living and to help around the house. the scientific definition of work is energy working on anothor object to make it work such as a dad moving the couch that would work for the scientifical definition of work but  hireing somebody whose job is to dig in the ground and to build hottubes that would not qualify for the scientic definition of work.

cinclusion 1

when i changed nail vs pulley the amount of wahsers the motor could lift decressed. when i used the nail the motor lifted more washers than the pulley. my hypothesis was that asthe nail vs pulley incresses the amount of washers the motor can lift will decressed and i was correct. my data shows that i was correct because the nail lifted 1 washer and the pulley lifted 0 washers.

the best manipulated variables to get the motor to lift the most washers are down below

3 batteries

nail

the batteries in series

a shortstring

4 wires

the motors can lift 7 washers

my motor generated 3.5 newtons of force

1. i learned that all but one of your variables has to be a conntrolled variable

2. reason why is because when you pull a block at a constont speed  you can mesure the force of friction by a spring scale 'cause the force of friction is mesured in newtons by the force you us to pull the block.

3. if you had ice the friction force whould decresse because ice is very slippery has little to no force of friction.

4. 6.1 when i changed the surface types the force of friction incressed and decressed. when i pulled the block on course snadpaper the block was harder to pull but when i put on thetable top the block was easy to pull. my perdiction was correct because i said that the rougher the surface type the more force of friction the block will have and the smoother the surface the less force on friction is on the block.  when i changed the surface types the force of friction incressed and decressed. when i slided the block on the course sandpaper the block was hard to slide cause there was alot of friction force. when i slided the block on the table top  the block slided with cause there is less friction force. my hypothisis was correct because i predicted that the if the surface type inceressed in roughness the force of friction would incresseand if the roughness on the surface type the force of friction would decresse.

6.2

 when i changed the weight of the number of blocks the force of friction incressed as i slided the block across the table top the more blocks i added on top of each other the more force of frictiion will be apon the blocks. my perdiction was correct that the more weight on the blocks the more friction force was apon the blocks. like when i slid the only one block the average amount of friction force was 3.0 newtons.when i added one more then i pulled two on the table then i got an average of 4.8 newtons. when i added one more i slid the three blocks across the tabletop i got an average of 8.6 newtons.

6.3

when i changed the surface area the friction force will increse because the bigger the surface area the more friction force.  my perdiction was right and wrong because when i slid the block on the small side the average was 1.225 newtons. when i slid the block on the medium side  the average was 1.4 newtons. when i slid the block on the large side the average was 1.225 newtons. so as i changed the surface the force of friction decressed and incressed.