Let's Do Science 3 – Text Book B

Page 135

When the forces acting on an object are change in motion.

, there is no

Re ga le du ca tio n

14.

15.

When the forces acting on an object are in motion.

, there is a change

Review

1.

List the forces that cause a ball to slow down and d stop when it is rolled along the ground.

2.

Describe and provide an example of a contactt forc force.

3.

True or false. Friction is a non-contact force. ce

4.

List three forces that can act at a distance. nce.

5.

Why does a rocket need a large e force to lift iit into space?

6.

True or false. An object at rest with zero n net force acting upon it will remain at rest.

7.

Describe what happens to an object objec when the forces acting on the object do not sum to zero.

8.

Predict and describe motion of the children. What are the forces be the mo that cause the motion?

129


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Articles inside

Light

5min
pages 146-149

Review

1min
pages 153-154

What Is Energy?

1min
pages 140-141

Review

4min
pages 135-139

Sound

5min
pages 142-145

What Is a Force?

18min
pages 112-127

Balanced and Unbalanced Forces

5min
pages 128-131

Position and Motion

9min
pages 104-111

Cooling Matter Review 94 w

6min
pages 98-103

Heating Matter

2min
pages 96-97

What Is Matter?

2min
pages 90-91

States of Matter

5min
pages 92-95

Climate Change

3min
pages 82-84

Climate

7min
pages 76-81

Weather and Seasons

5min
pages 72-75

Extreme Weather

3min
pages 70-71

Understanding Weather

1min
page 58

Measuring Weather

12min
pages 59-69

Review

5min
pages 29-33

Movement of the Earth

4min
pages 10-13

Minerals and Rocks

11min
pages 34-43

Using Minerals and Rocks

3min
pages 44-46

What Is Soil?

4min
pages 47-49
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