Term 1
24 Sept 2015
Dr. Fisher

Provide clearly readable answers to the questions in the space provided.

Show all work to obtain full credit.
 Attach additional pages if necessary to show additional work.
 Point values are shown for each question. There are 100 points total.

You may use a calculator
 GOOD LUCK!

Some data that may be of use:
Radius of the moon: 1740 km
Earth-Moon distance: 384,000 km
Earth-Sun distance: 149.6 x 10 6 km
Name _____________________________________________________
Physics I Exam 1 PRACTICE Term 1 Page 1 of 5

1.
(8 points) report the number of significant figures in each number: a.
3.14159 b.
6 billion
  d.
1/3.50 e.
0.5 x 10 112
2.
Carry out the calculations shown here and report the correct answer (value, sig figs, and units) (8 points each) a.
lbs kg m 3 balloons
22.0 (.0111) =
2.2 10
lb kg m 3 b.
g kg ball cm 3
1x10 3 3.33 100 3 =
3330
kg ball cm 3 m 3
3.
(12 points) Consider the moon in orbit around the earth, and use the earth as the reference point in your calculations. Some data is shown on the cover page. a.
Calculate the average speed of the moon in 28 days. b.
Calculate the average velocity of the moon in 28 days.
Physics I Exam 1 PRACTICE Term 1 Page 2 of 5

4.
Convert each of the following to SI units (m, s, kg), and show your answer with the correct significant figures (9 points each): a.
20.02 miles b.
0.255 km/yr 2 c.
0.0051 ton/ft 3
5.
(10 points) A cubical box has each side of 22 cm. How many pounds of water does this balloon hold? The density of water is 1000.0 kg/m 3
Physics I Exam 1 PRACTICE Term 1 Page 3 of 5

6.
Fill in the blanks regarding the rules for Significant Figures (5 points each) a.
Zero’s don’t count when ____________________________________________ b.
or when _______________________________________________________
7.
Write the numerical value of these prefixes (3 points each):
milli ______________
deci _______________
8.
(8 points) I have a spring-loaded dart gun. It shoots a dart at 6.5 m/s. a.
If the spring compresses a distance of 4.0 cm, what is the acceleration of the dart as it is being shot?
Physics I Exam 1 PRACTICE Term 1 Page 4 of 5

9.
Consider the dart gun again. I shoot the dart straight up, and want to calculate the height of flight. a.
(5 pts) Draw the situation, and label clearly positions, velocities, and other knowns or unknowns of interest. Also show the list of known and unknowns in a table. b.
(8 pts) Derive the maximum height as a function of g and v
0, and show the solution symbolically. Show that the units of this equation work out to length. c.
(5 pts) Calculate the value of the maximum height in SI units. Manage sig figs.
END OF PRACTICE EXAM
Physics I Exam 1 PRACTICE Term 1 Page 5 of 5