Newton's laws and forces

a body remains at rest or with constant velocity in an inertial frame if the net force is zero.

The acceleration of a body is proportional to the net force and inversely proportional to its mass.

action and reaction forces act on different bodies.

Weight is the product of mass and gravitational acceleration.

Kinetic friction is the product of the kinetic friction coefficient and the normal force.

Static friction does not exceed the product of the static coefficient and the normal force.

restoring force of an ideal spring.

• linear elastic regime.

On an inclined plane, the weight is resolved into components parallel and perpendicular to the surface.