Friction Lesson Slides: 4 Slides (Grade 8)

4 Slides • 5 Questions

1

Friction

2

3

Multiple Choice

The rougher the surface, the faster an object will travel over the surface.

1

True

2

False

4

5

Multiple Choice

Which of the following is an example of friction that is harmful?

1

Pencil marking on paper

2

Engine parts wearing out

3

sand placed on ice in the winter

4

Using an eraser to erase marks

6

Multiple Select

Why are the soles of shoes and tyres of vehicles grooved?

1

To increase friction

2

To reduce friction

7

Open Ended

Why do gymnasts apply a coarse substance to their hands?

Type response here

8

9

Multiple Choice

Which would NOT be a way of reducing friction?

1

making the surfaces smoother

2

using lubricants such as waxes, oils, or grease

3

changing from sliding friction to rolling friction using ball bearings

4

Using kitty litter on snow and ice to help your car gain traction

Friction

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