1. The document describes three experiments involving fundamental forces and measurements. 2. Experiment 1 measures the mass of an object using a balance. Experiment 2 measures the speed of an object. Experiment 3 measures the force required to lift an object with a spring scale. 3. The results and calculations from each experiment are presented along with the relevant units and quantities.

1. F 1 1
1.1
30201 F F 1
4 5 (A) 10
F F F
.. .
1. F F ( F, F, , )
F F
.
.
.
2. F F ( F, F, , )
F F
.
.
.
.
.
3. F F ( F, F, ,
) F F
.
.
.
.
.
.
.
.

2. F 1 1
1.2
30201 F F 1
4 5 (P) 40
F F F
.. F
1. F F F F
1. F F
2. F SI
2. F F F F F F
1. F .. ..
2. F F ..
3. F .
4. ..
5. F F .. . ..
6. F F
.
7. F F 5 ..
..
8. SI
9. F SI F
10. .. .
11. F
. 154,000,000 . 8,139,000
. 0.000237 . 0.00007
. 154,000,000 = 1.54 x 100,000,000
= 1.54 x ..

3. . 8,139,000 = 8.39 x 1,000,000
= 8.39 x ..
1
. 0.000237 = 2.37x
10,000
= 2.37x ..
1
. 0.00007 = 7.0x
100,000
= 7.0x
12. F F
. 824 F F
. 0.00267 F F
. 824 F 824x103
824x103 F 824x103x106x10- 6
824x103x106x10- 6 F
x109 x1011
1
. 0.00267 F 2.67x
1,000
1
2.67x F 2.67x10- 3
1,000
2.67x10- 3 F 2.67x10- 3x106
2.67x10- 3x106 F 2.67x103x102x10- 2
2.67x105x10- 2 F
.
************************

4. F 1 1
1.3
30201 F F 1
4 5 (A) 10
F F F
.. F
F F F
1. A B 12 Gm = m
2. 3 x 108 m/s = Mm/s
3. F 450 kg = .mg
4. 150 ( mm )2 = . m2
5. 250 ( mm )3 = . m3
6. F 2.56x1010 B = GB
7. 0.02 nm = m
8. 200 J ( ) = MJ
9. 10 ( hr ) = s
10. F F 72 km/hr = m/s