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1 Ch - Phy Sc M 7A

Physics - Forces (Apologia Physical Science M 7A)

QuestionAnswer
force a push or pull against an object
1 newton (N) is the force required to make an object with 1 kg accelerate at 1 meter per second squared; the SI unit for force
net force the total overall force acting on an object (after all of the forces are combined)
When an object has BALANCED forces acting on it (net force = 0), there is _______ change in the object's motion. NO
When an UNBALANCED force acts on object, the object accelerates.
friction a force that results when surfaces of objects rub against each other and oppose motion
friction that opposes motion once it has already started kinetic friction
Kinetic friction is a always a much _________________ frictional force than static friction. smaller
friction that opposes the initiation of motion static friction
fluid friction acts on objects moving through gas or liquids
air resistance the term for when fluid friction acts on an object moving through air
free fall the motion of an object when it is falling solely under the influence of gravity
Heavier objects fall faster than light objects due to the fact that light objects do not experience as much ______ _________________. air resistance
inertia the tendency of an object to resist changes in its velocity
Force is a __________ quantity. vector
A net force that does not equal 0 is an ________________ force. unbalanced
Kinetic friction is also called ______________________ friction. sliding or dynamic
The force of ______________ is the only force in which you do not need to push or pull something to get it moving. gravity
If there is nothing holding an object up, gravity causes an unbalanced force & gives the object constant _____________________. acceleration
Sir Isaac Newton English physicist, 1642-1727, devoted his life to performing experiments designed to help him understand creation
rolling friction the frictional force that acts on rolling objects
Galileo Galilei promoted conducting experiments to develop scientific arguments; began to develop the concept of inertia; argued that an object would continue moving at a constant speed forever unless stopped by a force
Created by: MrsHough
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