Plotting and Precision Lab

Name ________________________	Date ________
Section # ________	http://www.stmary.ws/physics/home/

Plotting/Precision Pre-Lab Activity

d (cm)	t (secs)
0	0
5	2
9	3
15	4
20	5
22	6
23	7
24	8

d (cm)	t (secs)
0	0
2	5
6	10
10	20
18	25
22	30
26	35
30	40

d (cm)	t (secs)
0	0
1	.4
9	.8
12	1.2
18	1.6
19	2.0
20	2.4
50	2.8

d (cm)	t (secs)
0	0
1	2
2	4
3	6
3	8
5	10
4	12
3	14

y scale ____

x scale ____

Taking and Reporting Precise Measurements

1. Use your ruler to measure the length of this line __________ (8 points)

2. All measurements are approximations. The way you report a measurement describes the precision of your measuring device.

Do all these measurements mean the same thing? (10 points) 1.0 1.00 1.000
Yes or No? Why?
When you report a number your last digit is looked on as an ________________.

Circle the number below that matches the measurement below

7.21 cm Precise to a tenth of a cm (10 points)

7.211 cm Precise to a _______________ of a cm (10 points)

7.2 cm Precise to a ________________ of a cm (10 points)

How would you report this measurement? ________________ (5 points)

How would you report this measurement? ________________ (5 points)

Lab Activity

1. Name one object in our classroom that has a length or width that is very close to 1 meter long _______________ (3 points)

a) Exactly what is this measurement? __________ m (2 points)

2. Estimate the height of Marist in meters _________________ m (3 points)
(Hand in on a separate piece of loose-leaf)

3. Find something in your book bag that has a length or width that is very close to 1 cm long _______________ (3 points)

a) Exactly what is this measurement? __________ cm (3 points)

4. Use your meter stick and stop watch to find out the approximate walking speed of one of your lab partners.

Speed = distance/time _____________ = ____________ (3 points)