Robert Hooke and uses of elastic objects

In this lesson we learn about Robert Hooke's life and other discoveries. We also discuss uses of elastic objects and how different spring constant effect how useful they are.

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Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Q1.What does the force vs extension graph show?

That extension and force are inversely proportional That there is no relationship between extension and force That extension and force are directly proportional That the sky is blue

1/9

Q2.What is the point called where the graph starts to curve?

Limit of proportionality Limit of elasticity Elastic limit Plastic limit

2/9

Q3.What happens after the elastic limit?

The graph will curve It will return to its original shape The deformation will be permanent Nothing

3/9

Q4.For an elastic object, when the force doubles, .......

The extension halves The extension doubles The extension stays the same The extension triples

4/9

Q5.For an elastic object, when the extension is divided by 3, .......

The force is halved The force is multiplied by 3 The force is divided by 3 The force is doubled

5/9

Q6.In the equation F = k x e, what does F represent?

Extension Force Spring constant Energy

6/9

Q7.In the equation F = k x e, what does e represent?

Extension Force Spring constant Energy

7/9

Q8.In the equation F = k x e, what does k represent?

Extension Force Spring constant Energy

8/9

Q9.What force is required to extend an object with spring constant 4 N/m to 2 m?

2 N 4 N 8 N 10 N

9/9

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Q1.What does the force vs extension graph show?

That extension and force are inversely proportional That there is no relationship between extension and force That extension and force are directly proportional That the sky is blue

1/9

Q2.What is the point called where the graph starts to curve?

Limit of proportionality Limit of elasticity Elastic limit Plastic limit

2/9

Q3.What happens after the elastic limit?

The graph will curve It will return to its original shape The deformation will be permanent Nothing

3/9

Q4.For an elastic object, when the force doubles, .......

The extension halves The extension doubles The extension stays the same The extension triples

4/9

Q5.For an elastic object, when the extension is divided by 3, .......

The force is halved The force is multiplied by 3 The force is divided by 3 The force is doubled

5/9

Q6.In the equation F = k x e, what does F represent?

Extension Force Spring constant Energy

6/9

Q7.In the equation F = k x e, what does e represent?

Extension Force Spring constant Energy

7/9

Q8.In the equation F = k x e, what does k represent?

Extension Force Spring constant Energy

8/9

Q9.What force is required to extend an object with spring constant 4 N/m to 2 m?

2 N 4 N 8 N 10 N

9/9

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Robert Hooke and Uses of Elastic Objects

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Q1.For an object with a larger spring constant, the force required to stretch it would be

Larger Smaller The same

1/9

Q2.This means more work is done so the energy stored in the spring is

Larger Smaller The same

2/9

Q3.For an object with a smaller spring constant the force required to stretch or compress it is

Larger Smaller The same

3/9

Q4.This means less work is done so the energy stored in the spring is

Larger Smaller The same

4/9

Q5.In a bow and arrow, when we let go of the string, the energy is transferred from the elastic potential store to the

Kinetic store of the arrow Kinetic store of the bow Elastic potential store of the arrow

5/9

Q6.Use Hooke's Law: Force = Spring constant x extension to calculate the force required to stretch a 5 N/m spring to 2 m

2.5 N 5 N 10 N 5 J

6/9

Q7.Use Hooke's Law: Force = Spring constant x extension to calculate the force required to stretch a 0.5 N/m spring to 4 m

2 N 3N 8N 3 J

7/9

Q8.Use Hooke's Law: Force = Spring constant x extension to calculate the extension produced if a force of 10 N is exerted on a spring with a constant of 5 N/m

3 m 4 m 2 m 3 N

8/9

Q9.Use Hooke's Law: Force = Spring constant x extension to calculate the spring constant if an extension of 4 m is produced with a force of 32 N.

8 N/m 8 J 32 N/m 4 J

9/9

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Robert Hooke and Uses of Elastic Objects

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Q1.For an object with a larger spring constant, the force required to stretch it would be

Larger Smaller The same

1/9

Q2.This means more work is done so the energy stored in the spring is

Larger Smaller The same

2/9

Q3.For an object with a smaller spring constant the force required to stretch or compress it is

Larger Smaller The same

3/9

Q4.This means less work is done so the energy stored in the spring is

Larger Smaller The same

4/9

Q5.In a bow and arrow, when we let go of the string, the energy is transferred from the elastic potential store to the

Kinetic store of the arrow Kinetic store of the bow Elastic potential store of the arrow

5/9

Q6.Use Hooke's Law: Force = Spring constant x extension to calculate the force required to stretch a 5 N/m spring to 2 m

2.5 N 5 N 10 N 5 J

6/9

Q7.Use Hooke's Law: Force = Spring constant x extension to calculate the force required to stretch a 0.5 N/m spring to 4 m

2 N 3N 8N 3 J

7/9

Q8.Use Hooke's Law: Force = Spring constant x extension to calculate the extension produced if a force of 10 N is exerted on a spring with a constant of 5 N/m

3 m 4 m 2 m 3 N

8/9

Q9.Use Hooke's Law: Force = Spring constant x extension to calculate the spring constant if an extension of 4 m is produced with a force of 32 N.

8 N/m 8 J 32 N/m 4 J

9/9

Lesson summary: Robert Hooke and uses of elastic objects

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