MFE Ch. 2: Forces

22 terms

force

a push or pull exerted on an object

Newton

A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second

net force

the overall force on an object when all the individual forces acting on it are added together

unbalanced forces

forces that produce a nonzero net force, which changes an object's motion

balanced forces

equal forces acting on an object in opposite directions

friction

the force that one surface exerts on another when the two rub against each other

static friction

the friction that acts on objects that are not moving

sliding friction

friction that occurs when one solid surface slides over another

rolling friction

friction that occurs when an object rolls over a surface

fluid friction

friction that occurs as an object moves through a fluid

gravity

the force that pulls objects toward each other

mass

the amount of matter in an object

weight

the force of gravity on an object at the surface of a planet

free fall

the motion of a falling object when the only force acting on it is gravity

air resistance

the fluid friction experienced by objects falling through the air

terminal velocity

the greatest velocity a falling object can achieve

projectile

an object that is thrown

inertia

the tendency of an object to resist any change in its motion

momentum

the product of an object's mass and velocity

law of conservation of momentum

the rule that in the absence of outside forces the total momentum of objects that interact does not change

satellite

any object that orbits another object in space

centripetal force

a force that causes an object to move in a circle