1) A disk with a red (inner) and green (outer nlack attached to it is spinning a

Question

1) A disk with a red (inner) and green (outer nlack attached to it is spinning at consatcnt angular acceleration. The disk has a radius of 10.0 cm anf a mass of 1.2 kg; the green black has a mass of 0.5 kg and is 8.0 cm from the center of the disk; the red disk has a mass od 0.8 kg and is 4.0 cm from the center of the disk.

A) Is there a net force on the green block?

B) Is there a net torque on the red block?

C) Is there a net torue on the disk?

D) Calculate the moment of inertia of the system (disk and blocks). Show work,

Explanation / Answer

1) yes there is a net force on green block...these are....the centripetal force given by mw^r and is towards the centre and tangential force given by mra where a is angular acceleration...

2)if a is the angular acceleration and I (=mr^2) is the moment of inertia of red block then net torque on it is given by T=Ia...so torque is present...

3)yes there is net torque on disc....its moment of inertia is I(=1/2MR^2)....so torque on disc is Ia.....

4)moment of inertia of disc=1/2MR^2=0.006

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.