| A | B |
|---|
| the force between 2 touching objects | friction |
| skiers wax their skis to | reduce friction |
| oil and grease are | good lubricants |
| using oil and grease to reduce friction | lubrication |
| a bath mat will | increase friction |
| friction will produce | heat and noise |
| rusty door hinges have | a lot of friction |
| part ofa bike which should be well oiled | axles |
| part of a bike which should not be oiled | brakes |
| friction which causes birds to glide | air resistance |
| friction which slows swimmers down | water resistance |
