Friction and Gravity

Front

What type of friction occurs when you rub your palms together?

Back

Sliding friction occurs.

Front

What happens to the applied force required to push something across a surface as friction increases?

Back

Increases.

Front

What law states that the force of gravity acts between all objects in the universe that have mass?

Back

Law of universal gravitation.

Front

What type of friction occurs when you push a desk that doesn't move?

Back

Static friction occurs.

Front

What type of friction occurs when you swim in a pool?

Back

Fluid friction occurs.

Front

Define friction.

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, depending on their masses and the distance between them.

Front

What is the difference between static friction and sliding friction?

Back

Static friction prevents motion between two surfaces, while sliding friction occurs when two surfaces are in motion relative to each other.

Front

What factors affect the amount of friction between two surfaces?

Back

The roughness of the surfaces and the force pressing them together.

Front

What is the formula for calculating gravitational force?

Back

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.