CPO Physical Science Chapter 4 Questions
and Answers () (Verified Answers)
force
is an action
force comes from what
interaction between atoms and energy
four elementary forces
strong nuclear, electromagnetic, weak, gravity
strong nuclear force
hold nucleus of atoms together. strong but reaches short distance
electromagnetic force
positive and negative charges. holds atoms together in molecules
weak force
force creates some kind of radioactivity
gravity force
all masses attract each other. you weight comes from mass of the earth attacking the mass of your
body
one pound = how many kg of mass
0.454 kg
how many newtons does it take to change the speed of a 1 kg mass by 1 m/s in 1 second ?
1
one pound of force = how many newtons
4.48 N
at earths surface, 1 kg of mass feels like how many newtons ?
9.8 newtons
, equation to calculate weight
W= mass X strength of gravity
force vectors include info to tell what
direction and strength of the force
what happens when you apply a compression force to a spring?
it collapses to become shorter
fluid friction
friction where an object moves through fluid meaning either gas or liquid
fluid friction example
swimming through a pool
rolling friction
friction between a rolling object and the surface it rolls on
rolling friction example
bike
static friction
friction in which two surface are not moving past each other
static friction example
trying to push a heavy couch across a carpet
sliding friction
friction where 2 surfaces slide past one another
sliding friction example
pushing a hockey puck on an ice rink
and Answers () (Verified Answers)
force
is an action
force comes from what
interaction between atoms and energy
four elementary forces
strong nuclear, electromagnetic, weak, gravity
strong nuclear force
hold nucleus of atoms together. strong but reaches short distance
electromagnetic force
positive and negative charges. holds atoms together in molecules
weak force
force creates some kind of radioactivity
gravity force
all masses attract each other. you weight comes from mass of the earth attacking the mass of your
body
one pound = how many kg of mass
0.454 kg
how many newtons does it take to change the speed of a 1 kg mass by 1 m/s in 1 second ?
1
one pound of force = how many newtons
4.48 N
at earths surface, 1 kg of mass feels like how many newtons ?
9.8 newtons
, equation to calculate weight
W= mass X strength of gravity
force vectors include info to tell what
direction and strength of the force
what happens when you apply a compression force to a spring?
it collapses to become shorter
fluid friction
friction where an object moves through fluid meaning either gas or liquid
fluid friction example
swimming through a pool
rolling friction
friction between a rolling object and the surface it rolls on
rolling friction example
bike
static friction
friction in which two surface are not moving past each other
static friction example
trying to push a heavy couch across a carpet
sliding friction
friction where 2 surfaces slide past one another
sliding friction example
pushing a hockey puck on an ice rink
