AP Physics 1

Newtons 1st law

An object at rest stays at rest, and an object in motion continues at a constant velocity, unless acted upon by a net external force. 

Newtons 2nd law

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass, pointing in the same direction as the net force. 

Newtons 3rd law

Whenever one object exerts a force on a second object, the second object exerts an equal in magnitude and opposite in direction force on the first object.

1st law example

hockey puck as it continues its constant speed in a straight line until acted upon by friction or a barrier

2nd law example

pushing an empty grocery cart resulting in rapid acceleration. Applying the same force to a fully loaded cart produces smaller acceleration due to the increased mass.

3rd law example

A walking pedestrian pushes backward on the ground with their foot, and the static friction from the ground pushed forward on the foot with equal magnitude.

Law of inertia

Newton’s first law is also called what?

Inertia also depends on what?

Mass

If the new force is zero

Motion remains the same

Seatbelts work due to?

Friction

Inertia of rest means

Resistance to change from rest

A moving object stops due to what?

Force

Balanced forces result in

No change

Inertia increases with

Mass

Net force zero means

No acceleration

Heavy objects have

More inertia

Force is needed to

Change motion

Inertia is

Property of matter

Newton’s first law explains

Motion behavior

Newton’s second law relates

Force, mass, acceleration

Formula of second law

F=ma

Force increases when?

When acceleration increases

Momentum is

Mass x velocity

Force causes

Acceleration

Unit of acceleration

M/s2

Heavy objects need

more force

Second law deals with

Motion with force

Acceleration depends on

Mass and force

More mass means

Less acceleration

Second law is used in

Physics calculations

F= ma shows

Relation of force and motion

Newton is unit of

Force