Formative Science 6 Quiz 3.1

In which situation does friction helps rather than cause problems?

• When a car’s brakes slow it down

• When ice reduces friction for a skater

• When a swimmer slipped on the wet tiles

You are trying to push a heavy box across a rough floor.

Which of the following would make it easier to move the box?

• Using wheels or placing a slippery mat under the box

• Adding extra weight to the box.

• Pushing the box harder to increase friction.

What type of friction allows a person to walk without slipping?

• Sliding friction

• Static friction

• Rolling friction

In which situation does friction becomes a disadvantage rather than a solution?

• Ben holding the hot mug on his hand

• The kids sliding along the muddy hill.

• Break and tear of machinery due to lack of grease or oil

What type of friction allows the boulder of rock to stay on the top of the cliff?

• Static friction

• Sliding friction

• Rolling friction

The roller coasters use the force of gravity. How does gravity make a roller coaster exciting yet safe?

• Gravity pulls the coaster downward after a climb, creating speed and thrill.

• It remove gravity using special materials to make the ride smooth.

• Gravity makes the coaster move only in one direction.

According to the researchers, gravity keeps planets in orbit around the Sun.

What would happen if gravity between the Earth and the Sun disappeared?

• Earth would move in a straight line through space.

• Earth would stop spinning and freeze in place.

• Earth would fall toward the Sun and burn up

Suppose friction suddenly vanish. How would this affect the way we walk, jump, or play sports?

• The movements would not change at all.

• We would be able to move, hold and do things properly.

• It would be harder to stop a moving object, walk without slipping and others.

Imagine you are an alien on Mars, where gravity is weaker than on Earth.

How would your weight and mass change have compared to when you are on Earth?

• Weight would decrease, but mass would stay the same.

• Both weight and mass will stay the same

• Weight would stay the same, but mass would decrease.

If gravity pulls everything down, why don’t airplane fall straight to the ground when they are flying?

• They use lift and thrust to counteract the pull of gravity.

• Airplanes and birds create a force stronger than gravity.

• Gravity does not affect objects in the air.