What is friction?

The video explains why cars skid on icy roads, focusing on the concept of friction. Friction is a force that acts in the opposite direction of movement, slowing objects down. The amount of friction depends on the surface type; smooth surfaces create less friction, while rough surfaces create more. On icy roads, the surface becomes smoother, reducing friction and increasing the likelihood of skidding.

What is the primary reason a car skids on an icy road?

• The car is moving too fast.

• The road is too narrow.

• There is less friction between the road and the tires.

• The car's tires are worn out.

In which direction does friction act relative to an object's movement?

• In the same direction as the movement.

• At a 45-degree angle to the movement.

• In the opposite direction to the movement.

• Perpendicular to the movement.

How does friction affect a moving object?

• It changes the object's direction.

• It slows down the object.

• It has no effect on the object.

• It speeds up the object.

What type of surface creates the least amount of friction?

• A rough surface.

• A smooth surface.

• A dry surface.

• A wet surface.

Why are car tires able to grip the road better on rough surfaces?

• Rough surfaces increase friction.

• Rough surfaces decrease friction.

• Rough surfaces are smoother.

• Rough surfaces are wider.