Amelia's notes

Question 1

what does static friction do to an object

Answer 1

prevents object from moving

Question 2

as friction increase so does what …. (vice versa )

Answer 2

static friction

Question 3

when is the equal sign only valid for static friction

Answer 3

impending motion

Question 4

what is impending motion

Answer 4

when the surfaces are on the verge of slipping

Question 5

when would you use inequality motion

Answer 5

when the surfaces are NOT on the verge of slipping

Question 6

when will kinetic friction act

Answer 6

whenever an object is in motion

Question 7

the direction with resistive forces is always … to motion

Answer 7

opposite

Question 8

when an object not acted on by any outside forces moves at a constant velocity (Newtons Laws)

Answer 8

1st law

Question 9

when the force is exerted on an object is equal to the product of the objects mass and acceleration
(Newtons Laws)

Answer 9

2nd law

Question 10

for every force that an object exerts onto a second object there is a equal but oppositely directed force that the second objects places on the first object
(Newtons Laws)

Answer 10

3rd law

Question 11

action and reaction forces must act on different or the same objects?

Answer 11

different objects

Question 12

resistance to motion is caused by what

Answer 12

electrostatic interactions between object and surface

Question 13

what can work done be defined as

Answer 13

scalar product

Question 14

completely specified by a single valve w/ appropriate unit and has no direction
(scalar quantity or vector quantity )

Answer 14

scalar quantity

Question 15

completely described by a magnitude and a direction
(scalar quantity or vector quantity )

Answer 15

vector quantity

Question 16

force produces no displacement = then no…

Answer 16

no work been done

Question 17

force perpendicular to displacement = no…

Answer 17

no work

Question 18

positive sign of work when force projected onto displacement when in what direction?

Answer 18

same

Question 19

negative sign of work when force projected onto displacement when in what direction?

Answer 19

opposite

Question 20

work transfers what?

Answer 20

energy

Question 21

work done on system positive energy is transfered where

Answer 21

to the system

Question 22

work done on system negative energy is transfered where?

Answer 22

away from the system

Question 23

what is the equation for kinetic energy

Answer 23

K= 1/2mv2

Question 24

energy related to configuration of a system in which the components of the system interact by forces

Answer 24

potential energy

Question 25

work done by lifting vertically against force of gravity and produces an increase in the energy of the system

Answer 25

gravitional potential energy

Question 26

hooke’s law is involved in what potential energy

Answer 26

elastic - force that spring exerts

Question 27

work is equal to different between initial and final valves of a expression related to the configuration of the system

Answer 27

elastic potential energy

Question 28

when is elastic potential energy stored in spring

Answer 28

spring compressed or stretch and always positive (same direction)

Question 29

total energy of the system changes
(what system)

Answer 29

non isolated systems

Question 30

total energy of the system is constant

Answer 30

isolated system

Question 31

forces which only transfer energy between kinetic and potential energy are called what

Answer 31

conservative

Question 32

if only conservative forces are doing work what does this mean for mechanical energy

Answer 32

constant = conservative
neither increases ir decreases

Question 33

force on a body is the ____ of _____ of its _____

Answer 33

rate of change, momentum