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# 8.6A Unbalanced Forces

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Author: Whitney Isbell
##### Description:

8.6A: At the end of this lesson the student is expected to demonstrate and calculate how unbalanced forces change the speed or direction of an object's motion.

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Tutorial

## Student Expectation Packet

Open your Student Expectation to the Third Six Weeks

Find the Student Expectation 8.6A: Demonstrate and calculate how unbalanced forces change the speed or direction of an object's motion

• Highlight the verb and the context clues that will help you in understanding the student expectation.

8.6A: Demonstrate and calculate how unbalanced forces change the speed or direction of an object's motion

## 8.6A Reference Text

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Source: based on stemscopes

## WSQ 8.6A Unbalanced Forces

For this lesson please make Cornell notes in your journal and create notes from the reference text and the video. Include the terms:

• force
• unbalanced force
• net force
• an example of calculating net force
• acceleration
• velocity
• speed

Be sure to include a summary at the end of your Cornell Notes about what you have learned.

At the end of this lesson please post a question if you need additional help.

## Practice: Copy this in your journal

Two children are pulling a rope from opposite ends. The child on the left pulls the rope with a force of 100 N and the child on the right pulls it with a force of 55 N. What is the net force acting on the rope and in which direction is it acting?

Solution:

The child on the left is pulling with a force of 100N

The child on the right is pulling with a force of 55N

The net force would be the difference between 100N and 55N. 100N-55N= 45N

The stronger force is pulling to the left

The answer is that the rope will move to the left with a  force of 45N.

## Quiz

Take the practice quiz on this page and see how well you are learning this lesson.