kogelbaan ax = 0 ay = - g
horizontale lancering x=0 y=h
v0x= v0 v0y = 0
ax = 0 ay = - g
lancering onder willekeurige hoek x = (v0 cos θ ) t
y = ( v0 sin θ ) t - ½ g t2
t landing : t = (2 v0 / g) sin θ
x landing : R = (v02 / g) sin (2θ )
h y = (v0 sin θ )g
t hoogste punt : t = (v0 sin θ ) / g
HOOFDSTUK 5
kracht ∑ ⃗F = m . a⃗
kracht met cte v a=0 ∑ ⃗F = 0
actie = reactie Fx op y = - Fy op x
(schijnbaar) gewicht & normaalkracht W=m.g
lift opwaarts ay = a Wa = m(g+a)
lift neer ay = -a Wa = m(g-a)
gewichtloos ay = -g Wa = 0
kracht F N = kg m/s2
massa m kg
gewicht W N
schijnbaar gewicht Wa
normaalkracht N
HOOFDSTUK 6
kinetische wrijving fk = μ k . N oppervlakten glijden over elkaar
statische wrijving fs, max = μs . N oppervlakten tov elkaar in rust
statische wrijvingscoëfficiënt μs = tan max
elastische kracht (wet van hooke) Fx = -k . x
centripetale versnelling acp = v2 / r
kracht bij ECB fcp = m . acp = m . (v2 / r) altijd naar middelpunt gericht
max snelheid zonder slippen vmax = μ s r g
√
kinetische wrijvingscoëfficiënt μk tussen 0 en 1, zonder eenheid
statische wrijvingscoëfficiënt μs tussen 0 en 1, zonder eenheid
veerconstante k N/m
HOOFDSTUK 7
arbeid W = F . d . cos θ = m . g . h
arbeid door meerdere krachten Wtotaal = W1 + W2 + … = Ftotaal . d . cos θ
arbeid op grafiek opp onder F(x)-grafiek
arbeid geleverd door veerkracht W = - k x2 /2
gemiddeld vermogen Pav = W / t
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