Friction

Friction

Multiple Choice

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

• True

• False

Multiple Choice

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

• Pencil marking on paper
• Engine parts wearing out
• sand placed on ice in the winter
• Using an eraser to erase marks

Multiple Select

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

• To increase friction

• To reduce friction

Open Ended

Why do gymnasts apply a coarse substance to their hands?

Multiple Choice

Which would NOT be a way of reducing friction?

• making the surfaces smoother
• using lubricants such as waxes, oils, or grease
• changing from sliding friction to rolling friction using ball bearings
• Using kitty litter on snow and ice to help your car gain traction