Reviewing Concepts
1. Which universal force can repel as well as attract?
Electromagnetic force is the only force that can both attract and repel.
2. Which universal force acts to hold the nucleus together?
The strong nuclear force acts within the nucleus to hold it together.
3. State in your own words what is meant by Newton's law of universal gravitation.
According to Newton's law of universal gravitation, every object in the universe attracts every other object.
4. How does friction with the atmosphere affect the speed of an artificial satellite?
Friction with the atmosphere slows artificial satellites in low orbit.
Critical Thinking
5. The moon in its orbit around Earth behaves like a ball at the end of a string being swung above your head. Explain the forces involved.
Earth's gravitational attraction acts as a centripetal force force on the moon.
Exploration Lab: Investigating a Balloon Jet (top right) 2/11/16
Learning Objective: I will examine the relationships between force, mass, & motion by observing the Balloon Jet Lab.
Copy data table onto right side page and record as I demonstrate the activity.
# of washers used
|
Trial #
|
Time (sec)
|
Distance (cm)
|
Avg Speed (cm/s) distance/time
|
0
|
1
|
1.5
|
300
|
200
|
0
|
2
|
1.1
|
300
|
265
|
2
|
1
|
0
|
0
|
0
|
2
|
2
|
1.9
|
113
|
59
|
Under the data table, write down the questions and answers below.
Analyze and Conclude (Answer with complete sentences)
1. Applying Concepts: Use a.)Newton's 2nd and b.)3rd Law to explain the motion of the balloon jet.
2. Analyzing Data: How did adding mass (washers) to the balloon jet affect its motion.
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