Understanding Friction and Forces

What is the force that holds back the movement of one object sliding over another?

• Gravity

• Friction

• Chance

• Electricity

Which surface is likely to have the highest frictional force?

• Smooth tile

• Concrete

• Carpet

• Wood

What type of friction occurs when an object just starts to move?

• Static friction

• Kinetic friction

• Rolling friction

• Fluid friction

What tool is used to measure the strength of force?

• Spring scale

• Barometer

• Thermometer

• Weight scale

What happens when a wooden block is dragged over sandpaper?

• Friction disappears

• Friction increases

• Friction decreases

• Friction stays the same

Why is it harder to pull an object across a rough surface than a smooth one?

• Rough surfaces create more friction.

• Rough surfaces are heavier.

• Smooth surfaces are colder.

• Rough surfaces are faster.

What happens to the frictional force when you add weight to the wooden block?

• It increases

• It decreases

• It stays the same

• It disappears

Which of the following does NOT affect the size of frictional force?

• Type of surface

• Weight of the object

• Speed of the object’s movement

• Use of a spring scale

If an object is continuously pulled over a smooth floor, what type of friction is involved?

• Static friction

• Rolling friction

• Kinetic friction

• Fluid friction

Which of the following is the best example of low friction?

• Car tires on a wet road

• Ice skating on ice

• Shoes on sand

• A cart on grass