Answers to Chapter 3 Worksheet (Projectile Practice)

1.  5.2 m
2.  vx = 5.0 m/s, vy = -10. m/s
3.  11. m/s at 64 degrees above (or below) horizontal
4.  2.3 m
5.  2.40 m
6.  a)  1.78s, b)  20.8 m/s at 56.8 degrees above (or below) horizontal
7.  0.845 m
8*.  5.2 m
9*.  4:1
10.  a)  vx = 13.0 m/s, vy = 10.9 m/s  b)  6.07 m   c)  2.22 s   d)  28.9 m  e)  vx = 13.0 m/s, vy = -10.9 m/s   f)  17.0 m/s at 40.0 degrees above horizon
11.  a)  3.88 s  b)  158 m  c)  12.2 m, yes, it will clear it!
12.  21.5 m
13.  34.1 degrees
14.  10.0 m/s
15.  a)  t= 14.3 s     b)  1140 m   c)  vx = 79.9 m/s, vy = -79.8 m/s  d)  113 m/s at 45.0 degrees
16.*  1380 m
17.*  4.15 m/s

End of 1st Quarter Deadline

Your deadline for late work and extra credit to be included in your 1st Quarter Grade is Monday, November 7 by 3:20 pm.  The only exception is that you may go to the SPARK lecture on the afternoon of November 7th and turn in your write-up by FLEX on Wednesday, November 9th.  Make sure that you check EdBox for missing assignments and ask me if you have any questions. 

October 31-November 11

• Tues 11/1:  Check off Chapter 3 Problems 10-17 (16+17 are extra credit).  Go over Projectiles Launched at an Angle.  "Snickers Lab".  Can your group get the steel ball into the cup after it rolls off the table?  Hand out Chapter 3 Review.  (Chapter 3 Test next Monday 11/7)
• Thursday 11/3:  Turn in Rocket Lab.  Go over Chapter 3 Review.  Start Forces.
• Mon 11/7:  Turn in Chapter 3 Review.  Take Chapter 3 Test.  More on Forces.  Free-body diagrams.  Start Newton's Laws.
• Wed 11/9:   More on Newton's Laws.  Newton's Laws Lab.  Lab due today or next Tues 11/16.
• Thurs 11/10:  No School.  Teacher Work Day for the end of 1st Quarter!!
• Friday 11/11:  No School.  Veterans Day.

Rocket Lab Instructions and Data

 

This is what you need for the Rocket Lab:

1.Neat and labeled Data Table (include angle, distance in yards, distance in meters, and 3 calculated values)

2.Calculate initial velocity for each angle (you may take averages)

3.Calculate height for each angle

4.Calculate time in air for each angle

5.Show 1 sample calculation for each type (using 3 step method)

6.Due by Thursday 11/3

 

Data for 4th Period:

Angle in Degrees       Distances in Yards

15                              43, 45

20                              62, 63

25                              80, 61

35                              82, 75

45                              77

 

Data for 6th Period

Angle in Degrees         Distance in Yards

15                                 51.0, 51.5

20                                 53, 62

(Switched caps)

25                                 51.5, 59.5

30                                 61.75, 66.5, 69

October 18-October 28 (updated)

• Tues 10/18:  Adding Vectors that are not perpendicular.  Work on Vector WS (due Thurs).  Begin Navigation Activity with maps.
• Thurs 10/20:  Turn in Vector WS.  Continue Navigation Activity.  Hand-out due Mon 10/22.  Start vectors launched horizontally.  Projectile Quick Lab.
• Mon 10/24:  Turn in Navigation Activity.  Chapter 3 WS, problems 1-9 (8+9 are extra credit).  Start Projectiles launched at an angle.
• Wed 10/26:  Turn in Projectile Quick Lab.  Check off HW problems and go over.  Range Equation.  Rocket Lab.  Data table, calculations, and conclusion due Fri.  Problems 10-17 (17 is extra credit) on Chapter 3 WS. 
• Fri 10/28:  Projectiles at an angle.  Work on Chapter 3 problems 10-17 (17 extra).  Instructions for Rocket Lab.  Short video clips from MIT.  Problems due Tuesday.  Rocket Lab due Thursday.  Chapter 3 Test on Monday 11/7.

Answers to Chapter 2 Review Sheet and Turn in Reminders

Here are the answers I got for the Chapter 2 Review.  Also, remember that the Reaction Time Lab (described in previous post) and the Graphing and Free Fall and Coffee Filter Lab Hand-out are due Monday 10/10.

1.  0.0802 km
2.  70. km/h
3. 11.4 s
4.  89.3 m
5. -15.2 m/s
6. -60.1 m
7. -1.5 m/s^2
8. a)  5.3 m/s    b)  233 m
9+10  We will go over in class

October 4-14 (answers to 2nd side of Chapter 2 WS at the bottom of post)

• Tuesday 10/4:  Check off Problems 12-16 (16 is extra credit) and go over.  Applying acceleration equations to free-fall.  Work time for problems 17-22 (22 is extra credit).  Reaction Time Lab.  Describe procedure, take data (at least 10 trials), and show calculation for at least one trial.
• Thursday 10/6:  Check off 17-22 and go over.  Turn in Reaction Time Lab.  Terminal Velocity Lab with Coffee Filters.  Hand out Chapter 2 Review.
• Monday 10/10:  Finish Coffee Filter Lab.  Go over Chapter 2 Review.
• Wednesday 10/12:  Testing Day.  Very short (20 minute) classes.  Last minute questions.  Start vectors.
• Thursday 10/13:  Chapter 2 Test.  Work on Vector Addition Worksheet.  Adding vectors that are not perpendicular to each other.
• Friday 10/14:  Statewide Inservice Day.  No School.

Answers to 2nd side of Chapter 2 Worksheet:
12.  4.5 m
13.  a)  1.6 m/s^2  b) 20. m
14.  a)  170 cm/s^2   b)  0.15 s
15.  - 0.69 m/s^2 (you can give it a negative sign or call it "south")
16.  Extra Credit
17.  -91.5 m/s
18.  1.11 s
19.  0.47 s
20.  1.7 s
21.  0.408 s
22. Extra Credit

SPARKS Lecture on Monday 10/3!

Remember that guest speaker, Matt Clark, Executive Director of the Johnson Creek Watershed Council will be speaking on the subject: "Salmon Restoration Project in the Metro Area's only Free Flowing Stream", on Monday from 3:45-4:30 pm in room 169.

You can get extra credit for your science class if you do the following:

1)  Make sure that you get there early or on time as the door is closed when the room is full!
2)  Sign in and/or get a signature from the speaker or science teacher present to verify that you were there
3)  Write a 1-2 page summary of what the speaker talked about and YOUR RESPONSE to it.  Please do not just turn in notes.  Transcribe them into a more readable format to get the extra credit.