Front

What does friction produce?

Back

Friction produces heat.

Front

What type of friction is not moving?

Back

Static friction is not moving.

Front

Rougher surfaces have ...

Back

Rougher surfaces have greater friction.

Front

How can friction be reduced?

Back

Friction can be reduced by reducing the force acting between the two surfaces, reducing the roughness of the surfaces, or using wax, grease, or oil.

Front

Which model has greater gravitational attraction (if any)?

Back

Model A has greater gravitational attraction.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other.

Front

What is the formula for calculating gravitational force?

Back

The formula is F = G * (m1 * m2) / r^2, where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses, and r is the distance between the centers of the two masses.

Front

What is static friction?

Back

Static friction is the frictional force that prevents two surfaces from sliding past each other.

Front

What is sliding friction?

Back

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

Front

What is fluid friction?

Back

Fluid friction is the resistance encountered when an object moves through a fluid (liquid or gas).