Download Forces and Motion - Catawba County Schools

Forces and Motion
Chapter 12
I. Forces
A. What is a Force?
1. Force –
2. What is the key concept in this section?
3. What is the unit of force?
4. Newton –
5. How many Newtons are there in 1 kg.m/s2?
6. What is used to represent the direction and strength of a force?
B. Combining Forces
1. Net Force –
2. What is the key concept in the balanced forces section?
3. What is the key concept in the unbalanced forces section?
C. Friction 1. Static friction –
2. Sliding friction –
3. Rolling friction –
4. What is used to reduce friction in machines?
5. Fluid friction –
6. Air resistance –
7. How is air resistance different at different speeds?
D. Gravity –
1. What is the key concept in this section?
2. What is the key concept in the section on falling objects?
3. Terminal velocity –
E. Projectile Motion –
1. What is the key concept in this section?
II. Newton’s First and Second Laws of Motion
A. Aristotle, Galileo, and Newton
1. What did Aristotle propose about force that was incorrect?
2. What did Galileo conclude about moving objects?
3.What did Newton introduce in his book Principia?
B. Newton’s First Law of Motion
1. What is the key concept in this section?
2. What is the force that will cause a ball to stop rolling?
3. Inertia –
C. Newton’s Second Law of Motion
1. How do unbalanced forces affect the motion of an abject?
2. Mass –
3. What is the key concept in this section?
4. What is the formula for Newton’s second law?
5. What direction is an object’s acceleration?
6. The unit N/kg is equivalent to what other unit?
7. How does Newton’s second law apply when a net force acts in the direction
opposite to the object’s motion
D. Weight and Mass
1. Weight –
2. What is the formula for weight?
3. Compare the weight formula to Newton’s second law formula.
4. What is the unit for force?
5. What is the key concept in this section?
III. Newton’s Third Law of Motion and Momentum
A. Newton’s Third Law
1. What is the key concept in this section?
2. What are the two forces referred to in Newton’s third law called?
3. If you use a hammer to drive a nail, what are the action and reaction forces?
4. What is an example of action-reaction forces that do not produce motion?
5. Why do action-reaction forces not cancel?
B. Momentum1. What is the key concept in this section?
2. What is the momentum formula?
3. What is the unit of measurement for momentum?
C. Conservation of Momentum
1. Law of Conservation of Momentum –
2. What is the key concept in this section?
IV. Universal Forces
A. Electromagnetic Forces 1. What is the key concept in this section?
2. Electric forces –
3. How do particles with opposite electric forces act?
4. How do particles with the same electric forces act?
5. Magnetic forces –
6. How do two magnetic poles that are alike act?
7. How do two magnetic poles that are different act?
B. Nuclear Forces
1. What is the key concept in this section?
2. Strong nuclear force –
3. Weak nuclear force –
C. Gravitational Force –
1. What is the key concept in this section?
2. What are the two things that affect gravitational force? (see Fig 21)
3. Centripetal force –
4. What are some uses for artificial satellites?