Uitgewerkte oplossingen van de oef. dynamica 1 studiebegeleiding

DYNAMICA 1: TWEEDE WET VAN NEWTON
OEFENING 1


T = 150N


gegevens T = 150 N N G=m.g
m = 150 kg
keuze assenkruis!
F = m . a => a = F / m = = 1 m/s²
N - G = 0 => N = G = 150 . 9,81 = 1,47 kN
Ty
T = 200 N

28°
Tx




gegevens T = 150 N N G
m = 150 kg
α = 28°
keuze assenkruis!
F = m . a => a = F / m = T x / m = T.cosα / m = 200 .cos = 1,18 m/s²
N + Ty - G = 0 => N = G - Ty = 150.9,81 - 200.sin28 = 1,38 kN

, OEFENING 3
D = 280N Dx
18°
Dy



keuze assenkruis! G
gegevens D = 280 N N
m = 180 kg
α = 18°

F = m . a => a = F / m = D x / m = D.cosα / m = 280 .cos = 1,48 m/s²
N - Dy - G = 0 => N = G + Dy = 180.9,81 + 280.sin18 = 1,85 kN