Understanding Friction

What happens when two surfaces rub against each other?

• They create a magnetic field.

• They start to melt.

• They produce a force called friction.

• They become smoother.

Tags

NGSS.MS-PS3-5

What is friction?

• A force that resists motion.

• A force that speeds up objects.

• A type of energy.

• A kind of sound.

Why is friction important in our daily lives?

• It stops time.

• It helps us fly.

• It allows us to grip and hold objects.

• It makes everything slippery.

Which surface would have less friction for ice skating?

• A rough concrete area.

• A smooth ice rink.

• A grassy field.

• A sandy beach.

What happens to friction when surfaces are smoother?

• Friction stays the same.

• Friction increases.

• Friction decreases.

• Friction disappears completely.

How does the weight of an object affect friction?

• Weight does not affect friction.

• Heavier objects have more friction.

• Lighter objects have more friction.

• Heavier objects have less friction.

Why is it easier to bounce a tennis ball than to lift kettlebells?

• The tennis ball has less friction.

• The tennis ball is heavier.

• The kettlebells are lighter.

• The kettlebells have less friction.

When would you want less friction?

• When going down a slide.

• When riding a bike.

• When stopping a car.

• When climbing a hill.

What is one benefit of increased friction when riding a bike?

• It makes the bike go faster.

• It makes the bike lighter.

• It helps the bike fly.

• It allows you to stop easier.

Tags

NGSS.MS-PS3-5

What is the effect of a rough surface on friction?

• It increases friction.

• It makes objects float.

• It decreases friction.

• It has no effect on friction.