Chapter 5: Projectile Motion Part 1 (5.1 - 5.3)

Chapter 5: Projectile Motion Part 1 (5.1-5.2)

SC.912.P.12.2

Analyze the motion of an object in terms of its position, velocity, and acceleration (with respect to a frame of reference) as functions of time.

Bellwork: Preview Video HERE

In class reading of 5.1 - 5.2

1. State the 2 things represented by vector arrows in physics. 
2. Decide whether the following statement is true or false: Velocity is a scalar quantity.
3. Determine which of the following are vector quantities: velocity, time, acceleration, momentum.
4. Complete the sentence: A scalar quantity includes only _______.
5. Explain how 2 scalar quantities are multiplied.
6. Determine which of the following are scalar quantities: 5 liters, 10 m/s north, 32 minutes, 2 cm south.
7. Decide whether a scalar quantity can be made into a vector quantity by simply adding a direction to its magnitude. Explain why or why not and give an example.
8. A diagram includes a 3-cm long arrow pointing to the right. The arrow is a vector scaled so that 1 cm = 10 m/s. Determine which statement below best describes the vector:

• a. 3 cm to the right	b. 30 m/s to the right
  c. to the right	d. 60 km/h to the right

9. An airplane flies in the same direction as the wind.  Decide whether the following statement is true or false: The velocity of the airplane is the sum of the airplane's velocity relative to the air and the wind's velocity relative to the ground. 
10. Decide whether the following statement is true or false: A tailwind increases the velocity of an airplane.
11. Decide whether the following statement is true or false: Vectors can only be used to add velocities that are parallel to each other.
12. Complete the sentence: The result of adding two vectors is called the __________.
13. Determine which vector listed below is the resultant of a 3-unit vector and a 4-unit vector that are perpendicular:

• a. 1-unit vector	b. 3-unit vector
  c. 5-unit vector	d. 7-unit vector

  
  
14. The figure below shows the addition of vectors with equal magnitudes at right angles to each other. Determine the statement that best describes the resultant.
• 
  
  

  a. 1 unit upward	b. 1 unit to the right
  c. √2 units at 45°	d. 2 units upward

  
  
  
  
15. Decide whether the following statement is true or false: The length of the diagonal of a square is always 1.414 times the length of either side.

Projectile Motion Lab

Go HERE for the procedures.

Chapter 4: Linear Motion Part 2 (4.5 - 4.9)

Chapter 4: Linear Motion Part 1 (4.5-4.9)

SC.912.P.12.2

Analyze the motion of an object in terms of its position, velocity, and acceleration (with respect to a frame of reference) as functions of time.

Bellwork: Preview Video HERE

In class reading of 4.5 - 4.9

1. Define the following Key Terms: elapsed time, free fall
2. Explain what is meant by the variable "g" in physics. What is its value?
3. If an object at rest is dropped from the top of a cliff, how fast will it be going at the end of 1 s? At the end of 2 s? 10 s?
4. Express the instantaneous speed, v, of an object falling from rest after an elapsed time, t, in equation form.
5. Draw the path of an object being thrown upwards. Label where the object is at its peak, and state the velocity of the object at that point. 
6. Using the same drawing, state the acceleration the object experiences throughout its flight.
7. During the span of the second time interval in Table 4.2, the object begins at 10 m/s and ends at 20 m/s. What is the average speed of the object during this 1 second time interval? What is its acceleration?
8. Express the distance, d, a freely falling object has fallen from rest in equation form. 
9. How far will a freely falling object that is released from rest fall in 2 s? In 10 s? In .5 s?
10. An apple drops from a tree and hits the ground in 1 s. What is its speed upon striking the ground? What is its average speed during the 1 s? How high above the ground was the apple when first dropped?

In class activity: Comparing Reaction Times

Chapter 4: Linear Motion Part 1 (4.1 - 4.4)

Chapter 4: Linear Motion Part 1 (4.1-4.4)

SC.912.P.12.2

Analyze the motion of an object in terms of its position, velocity, and acceleration (with respect to a frame of reference) as functions of time.

Bellwork: Preview Video HERE

In class reading of 4.1 - 4.4

1. Define the following Key Terms: relative, average speed, instantaneous speed, speed, velocity, acceleration.
2. Explain the idea that motion is relative and give an example.
3. Define speed with an equation.
4. Create a 3 part Venn Diagram that compares and contrasts average speed, instantaneous speed, and speed.
5. If you ride a bike a distance of 5 m in 1 s, what is your speed? What is you speed for 10 m in 2 s? For 100 m in 20 s?
6. Answer the questions for section 4.2 (pg 62)and show your work.
7. Explain the main difference between speed and velocity as used in physics.
8. If an airplane travels 500 km due north in 1 h, what is its velocity? If it travels 250 km due north in 1/2 h? 125 km north in 1/4 h?
9. Describe how it's possible to change velocity without changing speed.
10. Define acceleration with an equation.
11. Explain why acceleration is not simply an increase in speed. What other changes can cause acceleration?
12. Describe a situation in which acceleration changes because of a decrease in speed.
13. Describe a situation in which acceleration changes but speed does not.
14. What is the acceleration of a car that goes from rest to 100 km/h in 10s? What is the acceleration of a mechanical part that moves from 0 to 10 m/s in a time of 1s?
15. Answer the questions for section 4.4 (pg 62) and show your work.