life man

do not use for welsh or IB World Religions (SL)

Velocity

the speed and direction of a moving object

Force

a push or pull

Net force

combination of all forces acting on an object

Balanced forces

two or more forces whose effects cancel each other out and do not change the motion of an object

Unbalanced forces

two or more forces acting on an object that do not cancel, and cause the object to accelerate

Newton’s first law of motion

states that if the net force acting on an object is zero, the object will remain at rest or move in a straight line with a constant speed

Friction

force that acts to opposite sliding between two surfaces that are touching

Acceleration

the change in velocity divided by the time over which the change occurred

Newton’s second law of motion

states that an object acted upon by a net force will accelerate in the direction of the force, and the acceleration equals the net force divided by the objects’s mass

Weight

gravitational force between an object and earth

Center of mass

point in a object that moves as if all of the objects were concentrated at that point

Newton’s third law of motion

states that forces always act in equal but opposite pairs

Gravity

a force that exists between any two objects that have mass