COLLEGE PHYSICS FREEDMAN CHAPTER 28
KEY CONCEPTS AND PRACTICE QUESTIONS
◉ mass.
Answer: the measure of the amount of material in a body
◉ weight=.
Answer: mass x velocity
◉ objects are stable if.
Answer: lower com
large surface area
◉ objects will topple if.
Answer: vertical line through the com falls outside the base
a moment is produced which causes the object to rotate
◉ com is.
Answer: the point where all the mass of that object may be
considered to be
,◉ balance at com because.
Answer: the moments on each side are equal
◉ density is.
Answer: mass per unit volume
◉ density=.
Answer: mass/volume
◉ density tells us.
Answer: how closely the particles are packed
◉ friction is.
Answer: a force that opposes motion
◉ air resistance or drag.
Answer: occurs when the object moves through air or fluid
◉ reduce friction by.
Answer: lubrication
changing the material or fluid
rollers
, streamlining
◉ friction acts in the.
Answer: opposite direction of the object
◉ friction exists.
Answer: when two surfaces move over each other
◉ a force can.
Answer: change the direction of motion
change the shape of things
start objects moving and slowing down
◉ 2 main groups.
Answer: contact and distant
◉ contact.
Answer: forces touch the object and produce a change of shape or
state of motion
◉ distant.
Answer: forces act at a distance
KEY CONCEPTS AND PRACTICE QUESTIONS
◉ mass.
Answer: the measure of the amount of material in a body
◉ weight=.
Answer: mass x velocity
◉ objects are stable if.
Answer: lower com
large surface area
◉ objects will topple if.
Answer: vertical line through the com falls outside the base
a moment is produced which causes the object to rotate
◉ com is.
Answer: the point where all the mass of that object may be
considered to be
,◉ balance at com because.
Answer: the moments on each side are equal
◉ density is.
Answer: mass per unit volume
◉ density=.
Answer: mass/volume
◉ density tells us.
Answer: how closely the particles are packed
◉ friction is.
Answer: a force that opposes motion
◉ air resistance or drag.
Answer: occurs when the object moves through air or fluid
◉ reduce friction by.
Answer: lubrication
changing the material or fluid
rollers
, streamlining
◉ friction acts in the.
Answer: opposite direction of the object
◉ friction exists.
Answer: when two surfaces move over each other
◉ a force can.
Answer: change the direction of motion
change the shape of things
start objects moving and slowing down
◉ 2 main groups.
Answer: contact and distant
◉ contact.
Answer: forces touch the object and produce a change of shape or
state of motion
◉ distant.
Answer: forces act at a distance
