Content
UNIT 1 - Kinematics and 2D Motion
Terminology
Position - The location of an object at a certain time.
Distance - The total amount of length traveled throughout an entire trip.
Displacement - The difference between the current, or final, position and the initial position.
Correct Answers: A,B,C,D
Determining Velocity and Speed from a Position Time Graph:
- The Velocity on a position time graph can be found in the slope.
- To find the slope, calculate the change in position and divide that value by the change in time.
- If the slope is positive, the velocity will be positive. If the slope is negative, the velocity will be negative.
- Speed is the absolute value of the velocity, it will always be positive.
Interpreting Velocity Time Graphs
Determining Acceleration and Starting Velocity from a Position Time Graph
Given a position time graph:
- The slope is the velocity at that point
- You can find average velocity or instantaneous velocity, but in most cases average velocity is needed
- The velocity over a certain interval of time is the acceleration
Given a Velocity Time Graph
Determining Distance - Find the area, "Under," the curve. The area under the curve in this case is the absolute value of the area from the curve to the x-axis.
Determining Position - Find the area under the curve up until a certain time. This time instead of using the absolute value of the area from the curve to the x-axis, include direction with both negative and positive magnitudes.
Determining Displacement - Find the total area under the curve including direction. Displacement is the final position - the initial position.
Determining Position - Find the area under the curve up until a certain time. This time instead of using the absolute value of the area from the curve to the x-axis, include direction with both negative and positive magnitudes.
Determining Displacement - Find the total area under the curve including direction. Displacement is the final position - the initial position.
Connecting Representations of Motion
Uniformly Accelerated Motion and Constant Velocity Equations
Projectile Motion
Widget is loading comments...
Newton's First Law
Answers: D, C ,C, ACGIJ, D
Newton's Third Law
There are three common ways people quote and describe Newton's third law. The first is: Any action has an equal and opposite reaction. This is a good foundation, but is not the best possible definition of Newton's third law. It does not detail how Newton's Third Law Pairs work. The second is: Every action on an object has an equal and opposite reaction on the initiating object. This builds off of the foundation, but is still laking a clear definitive explanation of Newton's Third Law. The third is: Whenever two objects interact, each object exerts a force on the other. These forces are equal in magnitude but opposite in direction. This is a very good explanation for Newton's Third Law |
Identifying Interactions: System Schema and Force Diagrams
System Schema - When talking about solving Force problems, system schema are a very useful way to organize the Forces in a given problem. The way to create one is to draw each force as a, "Bubble," and connect each bubble with lines that correspond to forces. Each line represents a Force exerted on an object. This also helps visualize Newton's third law and third law pairs, because each object that exerts a Force on another object, a third law pair is created. Force Diagrams - Also known as Free Body Diagrams, Force Diagrams show all of the Forces acting on one object. Such Forces include the Force of gravity, Normal Force, Force of Friction, applied Force, Force of Tension, etc. The Forces all add to a net vertical and net horizontal Force. |
Force Calculations
Answers: B,C,C, False
Relating Representations of Motion and Force Models
Solving Problems with Forces and Motion
Solving problems with Forces and Motion is a difficult process. Luckily there are some great examples to help clear up any possible questions that may be had after learning about Dynamics.
Widget is loading comments...