Oppgave: Snurrebass m = 0{,}10 kg, r = 0{,}030 m, akse 30° over horisontalen. Finn dreiemomentet.
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τ =mgr⋅cosθ=0,10⋅9,81⋅0,030⋅cos30= mgr\cdot \cos\theta = 0{,}10\cdot 9{,}81\cdot 0{,}030\cdot cos30=mgr⋅cosθ=0,10⋅9,81⋅0,030⋅cos30°.
mgr =0,029430N⋅m= 0{,}029430 N\cdot m=0,029430N⋅m.
cos30° = 0{,}8660.
τ =0,029430⋅0,8660=0,0255≈0,025N⋅m= 0{,}029430\cdot 0{,}8660 = 0{,}0255 \approx 0{,}025 N\cdot m=0,029430⋅0,8660=0,0255≈0,025N⋅m.
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