合肥工业大学大学物理试题答案.doc

1. S:



(answer)
2. S:


(proved c)
3. S:
(answer)
D:


4. S:
= -6 J (answer)
5. S: ,

(answer of a)
rad/s (answer of a )
rad/s2 (answer of b )
is time varying not a constant (answer of c)
6. S:
(answer a)
(answer b)
7. G: m=, M=, L=, Irod=,
R: Isys, v0
S: Isys=Irod+(M+m)L2=+(+)×= (answer)
the system’s angular momentum about rotating axis is conservative in the collision.
(answer )
D: The bullet momentum (before impact), its angular momentum about rotating axis can be expressed as (a scalar)
8. S:

9. S:

10. S:
(answer)

11. S: from and we can get:
(answer of a)
Change of internal energy between A and B:
(answer of b)
The net work of the cycle:
(answer of c)
From the fir