aim : how do we solve friction, forces and gravity problems? day 4: forces & gravity activity...
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AIM: How do we solve Friction, Forces and Gravity problems? DAY 4: Forces & Gravity Activity SheetsOBJ: Given activity sheet and video SWBAT solve friction, forces and gravity problems with 70% accuracy.
DN: Take out Friction 3 and Friction Activity Sheets
ACT: Review Results: Friction 3 and Friction Activity Sheets.Complete Forces (Q: 2, 4, 9, 10 only) and Gravity Activity Sheets
HW: Complete 3 types of Motion and What makes things fall Activity Sheets; Study for SFFG Exam; SFFG Exam, Thursday April 30; NLSM Exam, May 28?
Friction 3 Activity Sheet-A.K.1. 16N
2. Because it makes it easier to move the object; Certain objects can be very heavy and because static friction is more than sliding, rolling and fluid friction.
3. When metal parts are rubbing (scraping) against each other (ex: watch, engine)
4. more
5. less; reduced
6. lubricant
7. reducing
Friction 3 Activity Sheet-A.K.1. decreases
2. less
3. more (more roughness)
4. less (more smoothness)
5. is
6. increasing
7. increase
8. greater
b
Friction Activity Sheet-A.K.1. 4 2. 4 3. 4 4. 4 5. 40 joules
6. least amount of friction; energy input is closest to energy output which shows an increase in efficiency.
7. spring scale
8. glue/attaching sandpaper to table; make table surface rough; adding additional mass/weight to block
9. reduces friction by rolling friction
Forces Activity Sheet-Answer Key
1. 3
2. 1
3. 2
4. 2
5. 2
6. 3
7. 2
8. 2
9. 3
10. 2
Gravity Activity Sheet-A.K.1. 1
2. 4
3a. A
3b. The closer the distance, the more the gravity
3c.
4. B will move; B may hit another satellite; B may crash to earth; B may fly out into space
Gravity Activity Sheet-A.K.4.More mass (larger size) ~ stronger the gravitational pull; less mass (small size) ~ weaker the gravitational pull.
5. Mercury, Mars, Pluto
6. Pull the bow string farther (more)
7. Gravity pulls arrow down so that the trajectory (path) is curve/arc–shaped.
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