Phys 250: Exam 2 Material
questions & answers
Force - answer A push or pull exerted on an object (N)
Newton's first law - answer every object continues in a state of
rest (uniform velocity) as long as the net force acting upon it is
zero
EF= 0
Newton's Second Law of Motion - answer the net force
(unbalanced/dynamic) acting on an object is equal to its mass x
acceleration
EF= ma
-larger the mass, larger the acceleration
Newton's third law of motion - answer when one object exerts a
force on a second object, the second object exerts an equal but
opposite force back on the first
if bug smashes on windshield of car, which exerted more force?
car or bug? - answer both exerted equal forces, but their
structural integrity is different
-bug's exoskeleton weaker than glass windshield, so it smashes
, contact forces - answer forces that have an effect only on objects
that they touch
field forces - answer non-contact forces that don't require
pressure to move
ex. magnets, gravity, electric attraction/repulsion
when forces are balanced - answer v=0
weight - answer the force of gravity acting on an object
Fg= mass (kg) x gravity (9.8 m/s^2)
-measured in N or (kgm/s^2)
Normal force - answer Force of the surface supporting an object.
Always acts perpendicular to the object (90 degree angle)
Tension - answer force applied through caple, rope, etc. that pulls
on an object
Friction - answer (f)
resistance of one object moving over another object/surface
*opposes motion*
questions & answers
Force - answer A push or pull exerted on an object (N)
Newton's first law - answer every object continues in a state of
rest (uniform velocity) as long as the net force acting upon it is
zero
EF= 0
Newton's Second Law of Motion - answer the net force
(unbalanced/dynamic) acting on an object is equal to its mass x
acceleration
EF= ma
-larger the mass, larger the acceleration
Newton's third law of motion - answer when one object exerts a
force on a second object, the second object exerts an equal but
opposite force back on the first
if bug smashes on windshield of car, which exerted more force?
car or bug? - answer both exerted equal forces, but their
structural integrity is different
-bug's exoskeleton weaker than glass windshield, so it smashes
, contact forces - answer forces that have an effect only on objects
that they touch
field forces - answer non-contact forces that don't require
pressure to move
ex. magnets, gravity, electric attraction/repulsion
when forces are balanced - answer v=0
weight - answer the force of gravity acting on an object
Fg= mass (kg) x gravity (9.8 m/s^2)
-measured in N or (kgm/s^2)
Normal force - answer Force of the surface supporting an object.
Always acts perpendicular to the object (90 degree angle)
Tension - answer force applied through caple, rope, etc. that pulls
on an object
Friction - answer (f)
resistance of one object moving over another object/surface
*opposes motion*
