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Moments OALH

Last updated almost 5 years ago
30 questions
Do Now
1

Streamlining an object means...

1

A streamlined object can travel ______ than a non-streamlined object

1

Describe what increases in size when a substance is heated

1

What flame should I leave Bunsen burner on if I am not using it

1

Calculate the average (mean), but exclude the anomaly:
3.48 3.46 3.45 3.21

1

Companies spend millions of pounds designing cars which are as streamlined as possible. Write a sentence naming three ways that you could streamline a car to make it faster.

Key Knowledge
1

Define "moment"

1

Define "pivot"

1

State what moments are used for?

1

How can you increase the moment?

1

Write the equation used to calculate a moment.

1

Define "moment"

1

Define "pivot"

1

State what moments are used for?

1

How can you increase the moment?

1

Write the equation used to calculate a moment.

Recall Quiz
1

1. A moment is....?

1

2. The point in the diagram above is called the?

1

3. How do you calculate a moment?

1

4. The units for a moment are?

Application tasks
1

Calculate the anticlockwise moment

1

Calculate the anticlockwise moment

1

Explain what would happen to the seesaw, (calculate both anticlockwise and clockwise moments then compare).

Exam Questions
1

1. A mechanic pushes on a spanner with a force of 50N. He pushes on the spanner 40cm from the end of the spanner.


What is the force and the distance?

1

2. Calculate the moment of the force using the information from Q1 (help below).
- Moment of the force (Nm) = Force (N) x Distance from pivot (m)
- Moment of the force (Nm) = _______ x ________
- Moment of the force = ______ Nm

1

3. A mechanic pushes on a spanner with a force of 50N. He pushes on the spanner 40cm (0.4m) from the end of the spanner.
What is the force and the distance?

1

4. Calculate the moment of the force using the information from Q3.
(Show how you would work it out).

1

5. Calculate the moment of this force. Show your working.

1

6. Look at this example of a balanced system.
a) Calculate the size of the clockwise moment
b) State the size of the anticlockwise moment _____________
c) Calculate the distance x.

1

7. STRETCH: Would the moment be bigger or smaller if he used a longer spanner? Explain your answer.