Phet.colorado Projectile Motion

Before going to the website you need to write a hypothesis for each experiment

Experiment A. Variable: Angle

Problem:

How will the angle effect the range of the projectile?

How will the angle affect the maximum height of the projectile?

How will the angle affect the hang-time of the projectile?

Hypothesis (pts):

Directions (pts):

Keep all variables constant accept for the angle. The variables you keep the same are called the ______variables. The angle that you are changing is called the ______variable. What you are measuring are the ______variable.

What Variablesshould you keep constant? (pts)

Data Table (pts)

Angle / Range / Time / Height
15
30
45
60
75
90

Questions: (pts)

1. Compare your hypothesis with your data.

2. What pair of angles will result in the same range?

3. What happens to the range as the angle increases?

4. What happens to the height as the angle increases?

5. How is the range affected by air resistance?

6. Sketch a graph of angle measure vs range and draw a line.

7. Sketch a graph of angle measure vs hang-time and draw a line.

8. Sketch a graph of angle measure vs height and draw a line.

9. Draw a picture of a typical projectile. Label all the key terms.

10. Is there a direct relationship between angle and range? What about angle and height? And angle and hang-time?

10. What angle causes the largest height?

11. What angle causes the largest range?

12. What angle causes the largest hang time?

Experiment B. Variable: Mass of Projectile

Problem:

How will the mass affect the range of the projectile?

How will the mass affect the maximum height of the projectile?

How will the mass affect the hang-time of the projectile?

Hypothesis (pts):

Directions:

Keep all variables constant accept for the mass.

You choose the mass amount to use.

Find the range, time and height at different masses

What Variables should you keep constant? (pts)

Data Table (pts) you choose 3 masses

Mass
(you choose) / Range / Time / Height

Questions:

  1. Compare your hypothesis with your data.
  2. What happens to the range as the mass increases?
  3. What happens to the height as the mass increases?
  4. Explain your observations.

Experiment C. Variable: Muzzle Velocity

Problem:

How will the muzzle velocity affect the range of the projectile?

How will the muzzle velocity affect the maximum height of the projectile?

How will the muzzle velocity affect the hang-time of the projectile?

Hypothesis (pts):

Directions (pts):

Keep all variables constant accept for the muzzle velocity. The variables you keep the same are called the ______variables. The angle that you are changing is called the ______variable. What you are measuring are the ______variable.

What Variables should you keep constant? (pts)

Data Table (pts) Choose 3 muzzle velocities

muzzle velocity / Range / Time / Height

Questions: (pts)

  1. Compare your hypothesis with your data.
  2. What is the relationship between muzzle velocity and height?
  3. Sketch a graph of muzzle velocity vs range and draw a line.
  4. Does the range change if air resistance is a factor?