1. Physics 151 Week 6 Day 2 Topics Trigonometry Review Vector Components
Vector magnitude and direction

2. General Motion Model
Answer: C 2

3. Constant Acceleration and Constant Velocity Model
Answer: C
Slide 2-4 3

4. Trigonometry and Vector Component Review
Be prepared to make reasonable estimations and state your assumptions when solving problems. Be aware of significant digits in your answers. (Keep lots of digits until the final calculation, then round to the appropriate precision. For intermediate steps, remember to keep one extra significant digit

5. Component Vectors and Components
Slide 3-22

6. Checking Understanding
What are the x- and y-components of these vectors?
Answer: B
3, 2
2, 3
3, 2
2, 3
3, 2
Slide 3-23

7. Answer What are the x- and y-components of these vectors? 3, 2 2, 3
Answer: B
3, 2
2, 3
3, 2
2, 3
3, 2
Slide 3-24

8. Checking Understanding
What are the x- and y-components of these vectors?
Answer: B
3, 1
3, 4
3, 3
4, 3
3, 4
Slide 3-25

9. Answer What are the x- and y-components of these vectors? 3, 1 3, 4
Answer: B
3, 1
3, 4
3, 3
4, 3
3, 4
Slide 3-26

10. Checking Understanding
The following vectors have length 4.0 units.
What are the x- and y-components of these vectors?
Answer: E
3.5, 2.0
2.0, 3.5
3.5, 2.0
2.0, 3.5
3.5, 2.0
Slide 3-29

11. Answer The following vectors have length 4.0 units.
What are the x- and y-components of these vectors?
Answer: E
3.5, 2.0
2.0, 3.5
3.5, 2.0
2.0, 3.5
3.5, 2.0
Slide 3-30

12. Angle φ that specifies the direction of is given by
tan–1(Cy /Cx)
tan–1(Cx /|Cy|)
tan–1(Cy /|Cx|)
tan–1(Cx /Cy)
tan–1(|Cx |/|Cy|)
Answer D

13. Angle φ that specifies the direction of is given by
tan–1(Cy /Cx)
tan–1(Cx /|Cy|)
tan–1(Cy /|Cx|)
tan–1(Cx /Cy)
tan–1(|Cx |/|Cy|)
STT3.4

14. Checking Understanding
The following vectors have length 4.0 units.
What are the x- and y-components of these vectors?
Answer: B
3.5, 2.0
2.0, 3.5
3.5, 2.0
2.0, 3.5
3.5, 2.0
Slide 3-27

15. Answer The following vectors have length 4.0 units.
What are the x- and y-components of these vectors?
Answer: B
3.5, 2.0
2.0, 3.5
3.5, 2.0
2.0, 3.5
3.5, 2.0
Slide 3-28

16. Vector Components
Be prepared to make reasonable estimations and state your assumptions when solving problems. Be aware of significant digits in your answers. (Keep lots of digits until the final calculation, then round to the appropriate precision. For intermediate steps, remember to keep one extra significant digit 16

17. Vector Components
Be prepared to make reasonable estimations and state your assumptions when solving problems. Be aware of significant digits in your answers. (Keep lots of digits until the final calculation, then round to the appropriate precision. For intermediate steps, remember to keep one extra significant digit 17

18. Problem 2.64
A 200 kg weather rocket is loaded with 100 kg  of fuel and fired straight up. It accelerates upward at 30.0 m/s2 for 30.0 s, then runs out of fuel. Ignore any air resistance effects.
A. What is the rocket’s maximum altitude?
B. How long is the rocket in the air?
C. Draw a (quantitative) velocity-versus-time graph for the rocket from liftoff until it hits the ground.
Be prepared to make reasonable estimations and state your assumptions when solving problems. Be aware of significant digits in your answers. (Keep lots of digits until the final calculation, then round to the appropriate precision. For intermediate steps, remember to keep one extra significant digit 18

19. Pictorial Diagram Example 2
Answer: C 19

20. Exam Tips Instantaneous velocity Area under the graph
Algebra in symbols
Givens Required
Complete explanations
Use homework to practice good solutions
Be prepared to make reasonable estimations and state your assumptions when solving problems. Be aware of significant digits in your answers. (Keep lots of digits until the final calculation, then round to the appropriate precision. For intermediate steps, remember to keep one extra significant digit