Friends challenge quiz

Which one is not a way of separating solid mixtures

• Sieving

• Use of magnets

• Evaporation

• Winnowing

The following are ways of reducing friction except

• Streamlining surfaces

• Polishing a piece of wood

• Pouring soapy water so that someone can be pranked

• Increasing Weight

Give one advantage of friction

Which one of the following is a second lever machine

• Crow bar

• Claw hammer

• Human foot

• Lid opener

How can you describe work?

What type of lever class is this?

• second class

• first class

• third class

• None of the above

Energy is?

Why is friction not needed in moving parts?

How does treads increase friction?

The following are ways of increasing friction except?

• Increasing weight

• Making a surface rougher

• Using a streamlined car to go to work

• Use of rollers