A. TITLE-
CONFIRMING NEWTON’S 2ND LAW OF MOTION
B. PURPOSE -
HOW CAN WE MEASURE THE FORCE IN NEWTONS OF
ANY SOLID MATTER?
C. HYPOTHESIS - THE FORCE IN NEWTONS (N.) OF ANY SOLID
MATTER CAN BE MEASURED BY EITHER USE OF A
SPRING SCALE CALIBRATED TO MEASURE NEWTONS
OF FORCE OR BY USE OF NEWTON'S 2ND LAW OF
MOTION FORMULA: F = MA OR W = MG
D. MATERIALS - 12 DIFFERENT SOLID OBJECTS, ELECTRONIC
BALANCES, 5N. SPRING SCALES AND RING STAND
E. PROCEDURE- 1. CHOOSE NO MORE THAN 4 OBJECTS AT A TIME.
2. TAKE OBJECTS TO ONE OF THE ELECTRONIC
BALANCES AROUND THE ROOM.
3. MAKE SURE BALANCE IS SET AT 0.0 G
4. RECORD MASS OF EACH OBJECT IN GRAMS.
5. BRING OBJECTS BACK TO LAB TABLE.
6. IN THE DATA CHART, DO THE FOLLOWING:
A. CONVERT GMs. TO KG.
(MOVE DEC. PT. 3 PLACES TO THE LEFT)
B. CONVERT KGS. TO NEWTON'S
(F = MA, A=GRAVITY (9.8), SHOW ALL WORK
AND DO NOT ROUND ANSWER)
7. HANG OBJECTS ON BALANCED SPRING SCALE.
8. RECORD FORCE IN N. TO NEAREST ½ TENTH.
9. REPEAT STEPS FOR ALL OTHER OBJECTS.
10. CALCULATE % OF ERROR FOR EACH OBJECT.
(COMPARE IDEAL FORCE WITH EXPERIMENTAL FORCE)
11. SET UP A BAR GRAPH AND GRAPH EACH OBJECT’S
SPRING SCALE FORCE MEASUREMENT OF
NEWTONS IN ASCENDING ORDER. (LOWEST TO
HIGHEST)
12. CONSTRUCT A LINE GRAPH THAT SHOWS THE
RELATIONSHIP BETWEEN THE MASS OF THE OBJECT & THE
PERCENTAGE OF ERROR (% E) THAT OCCURS. (HIGHEST
TO LOWEST)
13. ANSWER THE CONCLUSION
Object
MASS
In
Grams
Balance
MASS
In
Kg
g/1000
Force in Newtons
F=mxa
F = Newtons
Ideal Force
Force using
springscale
Experiment
Force
% Error =
Difference/ Ideal x 100