Week 1 Forces, Balanced and Unbalanced
Task 1 Maybe The Force is with you.
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1. Description
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Review of terminology
Build a glossary.
Write a definition of each of these terms. Elaborate on each with an example.
Write a definition of each of these terms. Elaborate on each with an example.
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Task 2
Pop Quiz - Force
1. A number that shows the size, or amount, of something and its unit is called a __________- A push of 30 newtons on a car is a _______.
2. The size of the measurement is called the _________ . The magnitude of the push on the car is __________ .
3. A measurement must show a number and the __________ . The car was pushed with a force of 30 _________.
4. The _______ shows the path of movement. When pushed the car will move to the _________ . We can show the direction of the push with an _________.
5. A ________ is a scientific rule about how things behave. It may be written as an equation. For example Newton's Second _________ is F=ma.
2. The size of the measurement is called the _________ . The magnitude of the push on the car is __________ .
3. A measurement must show a number and the __________ . The car was pushed with a force of 30 _________.
4. The _______ shows the path of movement. When pushed the car will move to the _________ . We can show the direction of the push with an _________.
5. A ________ is a scientific rule about how things behave. It may be written as an equation. For example Newton's Second _________ is F=ma.
Task 3
Measuring forces
Using a Spring Balance and an electronic balance
Aim: Measure and record the forces exerted on objects, when hanging and when resting on the bench. Analyse the data.
Method:
1. Measure the force in newtons exerted on the objects provided. Record the force and the mass of the object.
2. Gently lower the object onto the bench. Record the force in newtons.
3. Gently lower the object onto the electronic balance. Convert the reading to a force measurement and record.
Results:
Method:
1. Measure the force in newtons exerted on the objects provided. Record the force and the mass of the object.
2. Gently lower the object onto the bench. Record the force in newtons.
3. Gently lower the object onto the electronic balance. Convert the reading to a force measurement and record.
Results:
Conclusion:
Comment on your data. Describe what happened to the force on the object as it was placed on the bench.
Describe what happened to the force of the object as it was placed on the electronic balance.
Explain the concept you have observed.
Leave 5 lines
Comment on your data. Describe what happened to the force on the object as it was placed on the bench.
Describe what happened to the force of the object as it was placed on the electronic balance.
Explain the concept you have observed.
Leave 5 lines
Task 4 Crash Test Dummies
Write Method:
Part 1 Collision with barrier. Sketch and label the set-up. |
Part 2 Collision between two vehicles. Sketch and label the set-up. |
Conclusion:
Answer the questions from page 254.
Answer the questions from page 254.
Task 5 Homework Review, Text Work and Note-taking
Read pages 245 to 246
Write today's date and the Heading Forces; What they are, what they do and how they are measured. Turn to page 251 and answer question 1 in full sentences. Turn to page 245 and draw Figure 7.1.1 to show three meanings of force. |
Click on the button to explore different examples of forces.
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Task 6 Free-Body Diagrams
1. With a ruler and a pencil draw a square to
represent the object. Put a dot in the centre. 2. Use a ruler and a pencil to draw an arrow to represent the force.
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How to draw free-body diagrams.
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Free-Body Diagrams and Balanced and Unbalanced Forces
1. Draw the diagram below as a free-body diagram.
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2. Now draw the diagram below as a free-body diagram.
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3. Turn to your text book, pages 245 to 247. Draw as free-body diagrams Fig7.1.1, (not the twisting example), Fig7.1.5, Fig7.1.6, Fig7.1.7
Task 6
Measuring Force
The balances drawn below all measure weight force.
1. Identify the number of one of these balances that you have used in class. Write its name in your book and use pencil and a ruler to draw it. 2. Note beneath it the common features of this type of balance. |
It takes about 1 newton of force to lift and apple.
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4. Click on the image above to visit the website.
5. Scroll to the drawings of Equal-Arm Beam balances. These balances measure mass.
6. Identify the number of one of these scales that you have used in class.
Write its name in your book and use pencil and a ruler to draw it.
7. Note beneath it the common features of all of these scales.
5. Scroll to the drawings of Equal-Arm Beam balances. These balances measure mass.
6. Identify the number of one of these scales that you have used in class.
Write its name in your book and use pencil and a ruler to draw it.
7. Note beneath it the common features of all of these scales.
Task 7
Wheels in Motion
Inferences
1. Explain why the trolley stops.
2. How would people living around the time of Isaac Newton, (late 1600's)
explain how the trolley stops.
3. How did Newton explain how the trolley is stopped?
(Clue:Note the change of voice)
Investigating
1. List the factors that may affect how far the cart moves.
2. Remember that when we are thinking scientifically we should use measurable
quantities when making observations. For example, what quantity should we
use for "how far"?
3. List some measurable variables that may affect how far the cart moves.
4. Classify the variables that you have listed into two groups;
Independent variables
Dependant variables
1. Explain why the trolley stops.
2. How would people living around the time of Isaac Newton, (late 1600's)
explain how the trolley stops.
3. How did Newton explain how the trolley is stopped?
(Clue:Note the change of voice)
Investigating
1. List the factors that may affect how far the cart moves.
2. Remember that when we are thinking scientifically we should use measurable
quantities when making observations. For example, what quantity should we
use for "how far"?
3. List some measurable variables that may affect how far the cart moves.
4. Classify the variables that you have listed into two groups;
Independent variables
Dependant variables
Task 8 Balanced and Unbalanced Forces Science Investigation Skills
Read through the Force Investigation Sheet.
Write an AIM:
Method: Draw Diagram 1 as a free-body diagram.
Results:
Draw the Results Table
Conduct the Investigation
Record results in your table.
Complete the questions from the sheet.
Write an AIM:
Method: Draw Diagram 1 as a free-body diagram.
Results:
Draw the Results Table
Conduct the Investigation
Record results in your table.
Complete the questions from the sheet.