Gravity and Friction

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, acting in the opposite direction to the movement.

Front

What are the two main types of friction?

Back

The two main types of friction are static friction (acting on objects at rest) and kinetic friction (acting on moving objects).

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force is the Newton (N).

Front

How does mass affect gravitational force?

Back

As mass increases, the gravitational force also increases.

Tags

NGSS.MS-PS2-4

Front

What is gravity?

Back

Gravity is a noncontact force that attracts two bodies towards each other, proportional to their masses and inversely proportional to the square of the distance between their centers.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Front

What is static friction?

Back

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

Front

What is kinetic friction?

Back

Kinetic friction is the force that opposes the motion of an object that is already moving.

Front

What is the relationship between friction and surface texture?

Back

The texture of a surface affects the amount of friction; rough surfaces generally produce more friction than smooth surfaces.

Front

What is the formula for calculating gravitational force?

Back

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

Tags

NGSS.HS-PS2-4

Front

What is the gravitational constant (G)?

Back

The gravitational constant (G) is approximately 6.674 × 10^-11 N(m/kg)^2, a proportionality factor in the equation for gravitational force.

Tags

NGSS.HS-PS2-4