scalars *- *CORRECT *ANSWER-forces *with *magnitude *but *no *direction
contact *forces *- *CORRECT *ANSWER-requires *contact *eg *friction
non *contact *forces *- *CORRECT *ANSWER-doesnt *require *contact *eg *gravity
mass *and *weigth *- *CORRECT *ANSWER-directly *proportional
weight *- *CORRECT *ANSWER-mass *x *gravitational *field *strength
gravitational *field *strength *on *earth *- *CORRECT *ANSWER-9.81
resultant *force *- *CORRECT *ANSWER-the *overal *force *acting *on *an *object
if *a *resultant *force *moves *and *object *- *CORRECT *ANSWER-work *is *done
scale *drawings *- *CORRECT *ANSWER-triangular *drawings, *finding *the *hypotenuse *usually
*using *pythagoras *or *trigonometry
object *in *equilibrium *- *CORRECT *ANSWER-when *to *forces *acting *on *the *object *are
*balanced
extension *- *CORRECT *ANSWER-directly *proportional *to *force
, (spring) *force *- *CORRECT *ANSWER-spring *constant *x *extension
limit *of *proportionality/elasticity *- *CORRECT *ANSWER-when *an *elastic *object *gets *stretched
*too *much *and *it *become *plastic
moment *of *a *force *- *CORRECT *ANSWER-force *x *perpendicular *distance *from *pivot *to *the
*line *of *action *of *the *force
levers *- *CORRECT *ANSWER-make *it *easier *to *do *work *and *increase *the *distance *form *a
*pivot
gears *- *CORRECT *ANSWER-transmit *rotational *effects
pressure *of *an *obeject *- *CORRECT *ANSWER-force *÷ *area
pressure *in *fluids *- *CORRECT *ANSWER-height *above *point *X *density *of *fluid *X
*gravitational *field *strength
pressure *of *a *fluid *- *CORRECT *ANSWER-a *force *is *exerted *at *right *angles *to *any *surface
*in *contact *with *the *fluid
a *floating *object *- *CORRECT *ANSWER-weight *+ *upthrust
objects *in *water *- *CORRECT *ANSWER-experience *upthrust
atmospheric *pressure *- *CORRECT *ANSWER-decreases *with *height
an *object *will *sink... *- *CORRECT *ANSWER-if *it *displaces *a *volume *of *water *less *than *the
*objects *weight