quarter 3 quiz on friction

Why do drivers drive their car slowly during rainy days?

• Drivers drive slowly because the windshield is blurred.

• Drivers drive slowly because they are afraid of the rain.

• Drivers drive slowly because the road is wet so there is less friction.

• Drivers drive slowly because the road is wet so there is more friction.

Answer explanation

Friction is lesser in smooth surface, while friction is greater in rough surface.

Which is NOT a way of reducing friction?

• applying lubricant

• putting spikes on tires

• making the floor smooth

• putting grease on bicycle gears

Why do you need to put rollers under the cabinets when you want to move them?

• to apply more force

• to stop the movement of the cabinet

• to slow down the movement of the cabinet

• to minimize friction through the small surface of contact of the rollers.

Why do badminton players use rubber shoes while playing?

• to slide since the badminton court is slippery
• to glide faster since the badminton court is slippery
• to have lesser friction between their shoes and the floor.
• to have greater friction between their shoes and the floor.

Which of the following situations shows that friction is increased?

• Ana uses rubber shoes while jogging.
• Ruben puts rollers on heavy cabinets.
• Naldo puts grease on his bicycle gears.
• Belle puts floor wax to make the floor smooth.

In which of the following situations would friction most likely pose a problem?

• holding a pen to write
• striking a match to cook
• walking on a slippery floor
• rubbing your hands to warm them

Which of the following shows that friction could be harmful?

• writing on the board
• holding a piece of paper
• tearing out of bicycle gears
• using breaks when stopping

How do you describe the friction between a surface and an object with greater surface area?

• greater
• equal
• smaller
• the same

A crumpled and an uncrumpled paper were dropped at the same height and time, which paper will reach the ground first?

• The crumpled paper because it has a smaller surface area.
• The uncrumpled paper because it has a bigger surface area.
• Crumpled paper because it is heavier compared to the uncrumpled paper.
• None, because both the crumpled and uncrumpled paper have same masses.

A boy is playing with a toy car. In which surface will it travel faster?

• cemented floor
• carpeted floor
• grassy surface
• polished floor