HW #4 - Friction Flashcardizz

Front

What are the ways to reduce friction?

Back

1. Reduce the force acting between the two surfaces. 2. Reduce the roughness of the two surfaces coming in contact. 3. Use wax, grease, or oil. 4. All of the above are ways of reducing friction.

Front

What is the weight of a box if it takes 40 N to start moving with a coefficient of static friction of 0.54?

Back

74 N

Front

What type of friction acts on objects that are moving on a flat horizontal surface?

Back

Kinetic friction.

Front

How does the absence of friction affect a marble traveling on a long, straight path?

Back

The marble would remain at constant speed.

Front

What is the relationship between surface roughness and friction?

Back

Rougher surfaces have greater friction.

Front

Define static friction.

Back

Static friction is the force that keeps an object at rest and prevents it from starting to move.

Front

Define kinetic friction.

Back

Kinetic friction is the force that opposes the motion of two surfaces sliding past each other.

Front

What is the coefficient of friction?

Back

The coefficient of friction is a numerical value that represents the frictional force between two surfaces.

Front

How does lubrication affect friction?

Back

Lubrication reduces friction by creating a barrier between surfaces, minimizing direct contact.

Front

What happens to friction when the normal force increases?

Back

Friction increases as the normal force increases.