Answer:
a) 5.197rev/s
b) Kf/Ki =2.28
Explanation:
a) Angular momentum of the system L = Iw
ButLi=Lf
Kiwi =Ifwf
wf = (Ii/If)will = (4.65/3.4)×3.8=5.197rev/s
b)Kinetic energy KE= 0.5Iw^2
Ki = 0.5Iiwi^2
Kf=0.5Ifwf^2
Kf/Ki = Ifwf/Iiwi
Kf/Ki = (4.65/3.4))(5.197/3.8)
Kf/Ki = 1.22(1.368)^2
Kf/Ki = 2.28
the answer is c in question 7
Gravity, and Normal. Check the comments for why Applied isn't one.
M= Height of image/height of the object
If, M>1, then height of image>height of object.
And therefore, image is larger than the object.
It is like that, except most nails are steel or stainless steel, slowing to rusting process to about 5 years.
