12 forces quiz 1

a push or pull that causes an object to start moving, stop moving, or change direction

force

all forces have a ___ and ___

magnitude (amount)

direction

net force= ___ ___ (overall force acting on an object after all the forces)

total force

1 Newton= ____ x ____

1 kg

m/s²

force is measured in units called ___ (has to be capitalized)

Newtons (N)

____ ___ don’t cause a change in motion

balanced forces

____ ___- objects accelerate in the direction of the greater force

unbalanced forces

if two forces re exerted in the same direction you ___ to get the net force

add

if two forces are exerted in opposite direction you ___ to get the net force

*you cannot have a ___ force

subtract

negative

the force that acts on the objects that are not moving (this force tries to resist an object from being moved)

static friction

a force that acts on an object when it slides over a surface

sliding friction

A force that acts on an object when it rolls across the surface

*is much less than sliding friction

Rolling friction

A force that opposes the motion of an object as it moves through a fluid.

Fluid friction

Fluids are ____ and __

Liquids gases

Fluid friction through air

Air resistance

The amount friction of depends

1. ________

2. ________

The surface object is in/on

the weight of the object