enchantednights
23.02.2020 •
Physics
A level physics moments question please explain how the answer to (a) is 7.5N and the answer to (b) is 5.7N
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Ответ:
Explanation:
a) Sum of moments about the pivot:
∑τ = Iα
(10 kg × 10 m/s²) (0.3 m) + F (-0.4 m) = 0
F = 75 N
b) Sum of moments about the pivot:
∑τ = Iα
(20 N) (0.3 m) + (20 N) (-0.2 m) + F (-0.7 m) = 0
6 Nm − 4 Nm + F (-0.7 m) = 0
F = 2.9 N
Ответ:
thanks
Explanation: