SCIENCE Q3 Exam Reviewer

force

A push or a pull

springbalance

used to measure the force of an object

scalar quantity

magnitude only

vector quantity

both magnitude and direction

newton

the standard unit of force 

contact force

exerted by direct physical contact between two objects

non-contact force

does not involve direct contact between two objects

normal force

this is the force exerted by a surface in contact with an object

applied force

this is a force exerted directly on an object

friction force

this force occurs when two surfaces are on contact and move past each other

tension force

this is a pulling force exerted by a stretched rope, string, or cable on an attached object 

spring/restoring force 

this force is present in springs, causing them to return to their original position after being stretched or compressed

air resistance

this force opposes the motion of an object moving through the air

buoyant force

this is an upward force exerted by a fluid on a submerged object

gravitational force

this force is exerted by a massive object on another massive object

electromagnetic force 

this force can be either attractive or repulsive and acts between charged bodies