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الزخم الزاوي question — Physics Tawjihi, with answer

نفس كرة مثال ١١ تغيرت سرعتها من $20$ إلى $40\,rad/s$ خلال $5.0\,s$ . متوسط العزم المحصل:

الزخم الزاويLevel: Hard

Choices

8\,N\cdot m

0.008\,N\cdot m

0.8\,N\cdot m

0.08\,N\cdot m

The answer

0.08\,N\cdot m

Explanation

I=0.02\,kg\cdot m^2

، و

\Delta L=I\Delta\omega=0.4

، لذلك

\tau=0.4/5.0=0.08\,N\cdot m

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الزخم الزاوي question — Physics Tawjihi, with answer

نفس كرة مثال ١١ تغيرت سرعتها من 202020 إلى 40 rad/s40\,rad/s40rad/s خلال 5.0 s5.0\,s5.0s. متوسط العزم المحصل:

Choices

The answer

Explanation

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نفس كرة مثال ١١ تغيرت سرعتها من $20$ إلى $40\,rad/s$ خلال $5.0\,s$ . متوسط العزم المحصل: