Rough surfaces, like sandpaper, create more friction.

Lubrication makes machine parts slow down or stop.

Texture is how fast or slow an object moves.

Dragging your feet on the ground as you swing on a swing will slow it down.

Oil or grease will ________________ friction.

Rough surfaces create ___________________ friction.

Sandpaper keeps a car from moving quickly down a ramp

because the friction ______________ on the surface of the wheels.

Texture and lubrication will affect the ______________ of an object.

Smooth surfaces create _______________ friction.

What could you do to make your toy car go faster and why?