Quarter 3 Science Study Guide #2: How Friction Affects Movement

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How does friction affect a moving object?

It acts in the same direction as motion.
It acts opposite to motion. (correct)
It has no effect on the object's movement.
It increases the object's speed.

What is the relationship between surface roughness and friction?

Smooth surfaces have no friction.
Rough surfaces have more friction. (correct)
Smooth surfaces have more friction.
Rough surfaces have less friction.

Why is it easier to run on a concrete pavement than on sand and gravel?

Because concrete pavement has less friction. (correct)
Because sand and gravel are smoother.
Because concrete pavement has more bumps.
Because sand and gravel have less friction.

How does the amount of friction change between two objects with different surfaces?

It increases on smooth surfaces. (B) Signup and view all the answers

What effect do bumps and grooves on surfaces have on friction?

Increase friction on rough surfaces. (C) Signup and view all the answers

How can objects reduce friction when in motion on rough surfaces?

By polishing the surface to make it smoother. (B) Signup and view all the answers

How does friction affect the movement of objects?

Decreases speed (D) Signup and view all the answers

What is the impact of friction on the rolling or sliding of an object on a rough surface?

It makes the object move slower (D) Signup and view all the answers

Why does a skateboard roll slowly on a ground with sand and gravel compared to a concrete pavement?

The rough surface increases friction (C) Signup and view all the answers

What happens to the speed of an object when it moves on a newly polished wooden floor?

Speed increases (B) Signup and view all the answers

If friction between two objects decreases, what is the impact on the speed of movement?

Speed increases (B) Signup and view all the answers

How does a rough surface affect the motion of objects compared to a smooth surface?

Rough surfaces decrease speed (D) Signup and view all the answers

What is the primary purpose of having sand or gravel on playground flooring?

To slow down the speed of running children and prevent accidents (A) Signup and view all the answers

What is the function of speed bumps or speed breakers on roads?

To force vehicles to slow down and control their speed (D) Signup and view all the answers

Why do vehicles running on rough terrains like mud or snow have larger and deeper tire treads?

To increase friction and improve traction on slippery surfaces (A) Signup and view all the answers

What is the purpose of shallower tire treads on vehicles running on concrete pavements?

To channel water away from the tire and prevent hydroplaning (C) Signup and view all the answers

What is hydroplaning, and how do tire treads help prevent it?

Hydroplaning is the loss of traction due to excessive water on the road, and tire treads help channel water away from the tire. (A) Signup and view all the answers

What is a potential disadvantage of high friction between objects in contact?

The text does not mention any disadvantages of high friction (C) Signup and view all the answers

Friction's effect on motion

Friction opposes the movement of an object.

Rough surface and friction

Rough surfaces have more friction than smooth surfaces.