Podcast
Questions and Answers
What is the speed of the train at 20 seconds?
What is the speed of the train at 20 seconds?
The train reaches a velocity of 10 m/s to the left at 45 seconds.
The train reaches a velocity of 10 m/s to the left at 45 seconds.
True
What is the velocity of the train at 0 seconds?
What is the velocity of the train at 0 seconds?
6 m/s to the right
At 30 seconds, the train's velocity is _____ m/s to the left.
At 30 seconds, the train's velocity is _____ m/s to the left.
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Match the following times with the corresponding velocities of the train:
Match the following times with the corresponding velocities of the train:
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Which level of challenge requires the use of velocity graphs?
Which level of challenge requires the use of velocity graphs?
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Motion can be represented using graphs, which can help scientists analyze movement.
Motion can be represented using graphs, which can help scientists analyze movement.
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What is the primary function of the motion sensor in the lab?
What is the primary function of the motion sensor in the lab?
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In order to collect sensor data, you must connect the motion sensor to the ______.
In order to collect sensor data, you must connect the motion sensor to the ______.
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When a train is moving to the right along a straight track, its velocity graph can show which of the following?
When a train is moving to the right along a straight track, its velocity graph can show which of the following?
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Match the challenge levels with their corresponding descriptions:
Match the challenge levels with their corresponding descriptions:
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Why might it be useful for scientists to graph motion?
Why might it be useful for scientists to graph motion?
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To start the motion sensor data collection, you must choose ‘Add ______’ in Graphical Analysis.
To start the motion sensor data collection, you must choose ‘Add ______’ in Graphical Analysis.
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Which of the following best describes Sammy’s journey?
Which of the following best describes Sammy’s journey?
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Acceleration is a measure of how much speed changes over time.
Acceleration is a measure of how much speed changes over time.
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What equation can be used to calculate acceleration?
What equation can be used to calculate acceleration?
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Sammy gradually speeds up, walks at a steady speed, and then ___.
Sammy gradually speeds up, walks at a steady speed, and then ___.
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Match each phase of Sammy’s journey with its corresponding description:
Match each phase of Sammy’s journey with its corresponding description:
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What is the term used for the external push or pull on an object?
What is the term used for the external push or pull on an object?
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All forces have only a magnitude and do not have direction.
All forces have only a magnitude and do not have direction.
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What is meant by 'resultant force'?
What is meant by 'resultant force'?
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Force is measured in _____ (abbreviation).
Force is measured in _____ (abbreviation).
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Which of the following factors can be changed to affect the motion of a trolley attached to a balloon?
Which of the following factors can be changed to affect the motion of a trolley attached to a balloon?
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Match the following terms with their definitions:
Match the following terms with their definitions:
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The head of a force arrow in a diagram indicates its magnitude.
The head of a force arrow in a diagram indicates its magnitude.
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How do forces affect motion?
How do forces affect motion?
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What is the resultant force when the upward force is 10 N and the downward force is 10 N?
What is the resultant force when the upward force is 10 N and the downward force is 10 N?
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An object will remain still if the resultant force acting on it is not equal to zero.
An object will remain still if the resultant force acting on it is not equal to zero.
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What happens to an object when the resultant force acting on it is not zero?
What happens to an object when the resultant force acting on it is not zero?
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Newton’s _____ law states that an object at rest will stay at rest unless acted upon by a resultant force.
Newton’s _____ law states that an object at rest will stay at rest unless acted upon by a resultant force.
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If a skydiver is in free fall, which forces are acting on them?
If a skydiver is in free fall, which forces are acting on them?
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Describe the resultant force when two forces of 60 N and 15 N are pushing against each other.
Describe the resultant force when two forces of 60 N and 15 N are pushing against each other.
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Match Newton's laws of motion with their descriptions:
Match Newton's laws of motion with their descriptions:
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According to Newton's third law, forces between two interacting objects are unequal.
According to Newton's third law, forces between two interacting objects are unequal.
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According to Newton's 3rd Law, what happens when Melanie pushes Lee?
According to Newton's 3rd Law, what happens when Melanie pushes Lee?
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Melanie will accelerate faster than Lee because she has a smaller mass.
Melanie will accelerate faster than Lee because she has a smaller mass.
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What is the term for the constant velocity a skydiver reaches when air resistance equals gravitational force?
What is the term for the constant velocity a skydiver reaches when air resistance equals gravitational force?
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A parachute increases air resistance by covering a __________ area, which reduces terminal velocity.
A parachute increases air resistance by covering a __________ area, which reduces terminal velocity.
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Match the forces with their effects:
Match the forces with their effects:
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What happens when friction increases in a skateboarding scenario?
What happens when friction increases in a skateboarding scenario?
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Energy can be created and destroyed according to the First Law of Thermodynamics.
Energy can be created and destroyed according to the First Law of Thermodynamics.
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Explain how skydivers can change direction during freefall.
Explain how skydivers can change direction during freefall.
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Study Notes
Unit 2: Motion
- Physical movement can be measured and understood to ensure safety.
- Identify motion and forces in sports and other areas.
- Review motion concepts.
Vernier Graphical Analysis
- Open 'Manager' on computer and install Vernier Graphical Analysis.
Data Collection
- Connect motion sensor to LabQuest Mini and then to computer.
- Choose 'sensor data collection' in Graphical Analysis.
- Collect data from Vernier sensors.
Add Graph Match
- Start with a position graph.
- Use 'Add Graph Match' function.
Reading the Graph
- The graph displays a train's velocity over time.
- Understand velocity changes and directions.
- Match velocity to each time point on the provided graph.
Challenge Levels
- Level 1 (Novice): Match graph from screen.
- Level 2 (Intermediate): Partner gives instructions.
- Level 3 (Expert): Study screen, make notes, match graph. Use tools
- Level 4 (Genius): Match graphs using velocity graphs.
Motion Graphing Stories
- Examine how motion can be displayed on graphs.
- Scientists use graphs to visualize motion.
- Create your own motion graphs, checking your solutions.
Reading the Graph (Answers)
- Match velocities to specific time intervals on the graph.
Reading the Graph 2 (Answers)
- Determine the corresponding time values for each specific velocity.
Telling the Story (Graphs)
- Understand a graph plotting Sammy's journey to the shops.
- Analyze Sammy's movement patterns (i.e. acceleration and stopping).
Telling the Story (Graph 2)
- Analyze a graph that represents Sammy's walking journey.
Acceleration
- A measure of how speed changes over time.
- Calculated using ∆v / ∆t (change in velocity over change in time)
- Can be determined from a velocity-time graph.
Acceleration - Situations
- The changing velocity of vehicles depicted in diagrams.
- Constant speed (No acceleration).
- Speeding up (Positive acceleration).
- Slowing down (Negative acceleration).
Acceleration (Calculations)
- Example velocity-time graphs and calculations.
- Equations and units.
Thinking About Acceleration
- Comparing acceleration between moving objects.
- Based on given speed and time intervals.
Slowing Down and Speeding Up
- Look at experiments conducted using motion sensors.
- Observe changing motion.
See Think Wonder
- Explore concepts by observing, thinking, and questioning.
- Involve careful observation and thoughtful exploration.
Forces Affecting Motion
- Forces can push or pull objects.
- Calculating the resultant force, which is the sum of forces acting.
Types of Forces
- Various forces exist, categorized as contact or non-contact.
Force Diagrams
- Forces are visually represented as arrows, originating at an object's center of mass.
- Direction is determined by the arrowhead.
- Magnitude (size) is indicated by the arrow's length.
- Standard unit of force is newtons (N).
How to Calculate Resultant Force
- Find the sum of forces, considering directions (e.g. Up or Down).
Effect of Resultant Force on Movement
- Zero resultant force: Object remains stationary or moves at a constant speed.
- Non-zero resultant force: Acceleration, deceleration, or change in direction.
Calculating Resultant Force (Questions)
- Evaluate the overall force acting on objects.
What Happens Next?
- Analyze forces acting to determine the resulting movement of objects.
Reading Task
- Read and take notes on forces in action, including diagrams and key terms.
Who Wants to Skydive?
- Analyze forces and acceleration during a skydiving sequence. Draw a diagram.
Newton's Laws of Motion
- Overview of Newton's three laws of motion.
Newton's First Law
- Explains how rest or constant motion maintains itself without external force.
Newton's Second Law
- Describes how force, mass, and acceleration relate to one another.
Newton's Third Law
- Describes interactions between objects with equal and opposite forces.
Movement, Safety & Sports
- Review car safety features and relate them to forces and energy principles.
- Practice calculating force using Newton's second law.
What Features Do Our Cars Have?
- Identify common safety features found in modern vehicles.
- These absorb kinetic energy during collisions.
Why Are Cars Built to Crumple?
- To absorb kinetic energy, reducing the force of impact in a crash
How Have Our Cars Improved Over the Years?
- Study the improvements in vehicle safety designs over time.
Understanding Car Crashes - Basic Physics
- Outline the basic physical principles associated with vehicle collisions.
Task
- Complete exercises, including explanations of common safety features (seat belts, airbags, and crumple zones) in modern vehicles.
Self-Assessment
- Apply knowledge on acceleration and force to predict the effects of collisions.
Collisions in Sports
- Analyze the physics of sports-related collisions to reduce injuries.
- Use data collection and analysis skills for this purpose.
School Sports & Injuries
- Review stats for injuries due to common sports activities.
Calculating Kinetic and Potential Energy
- Calculate kinetic and potential energy for given scenarios.
- Identify scenarios with high energy potential.
Kinetic Energy
- Energy possessed by objects due to their motion.
Gravitational Potential Energy
- Energy objects possess due to their location within a gravitational field.
Energy in Motion
- Discuss relationships between kinetic and potential energy.
Energy Transformations
- Summarize the changes in energy during activities.
Friction Increases
- Analyze the effects of increasing friction in systems.
Skate Park Simulation
- Use a simulation of a skate park to recognize transformations between kinetic and gravitational potential energy during motion.
Plenary
- Review examples of forces, movements, and magnitudes in diagrams.
Balanced or Unbalanced Forces
- Determine balanced and unbalanced forces in various scenarios, based on examples given.
Studying That Suits You
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Description
This quiz tests your understanding of motion, specifically focusing on the velocity of a train at various time intervals. It explores the use of velocity graphs and the function of motion sensors in a lab setting. Prepare to match challenges with their descriptions and analyze different aspects of train movement.
