Answer:
(a) 0.0225 kg m^2
(b) 0.5 kg
Explanation:
Diameter, d = 60 cm
radius, r = 30 cm = 0.3 m
KE = 0.250 J
f = 45 rpm = 45/60 rps = 0.75 rps
(a)
Angular velocity, ω = 2 x π x f = 2 x 3.14 x 0.75 = 4.71 rad/s
Where, I be the moment of inertia
0.250 = 0.5 x I x 4.71 x 4.71
I = 0.0225 kg m^2
Thus, the moment of inertia of the disc is 0.0225 kg m^2.
(b) Let m be the mass of disc.
Moment of inertia of the disc is
I = 0.5 x m x r^2
0.0225 = 0.5 x m x 0.3 x 0.3
m = 0.5 kg
Thus, the mass of the disc is 0.5 kg.
Answer:
B) Force of gravity
Explanation:
As it is the force which acts downward on the body towards the ground, it is clearly the force gravity represented by the arrow at A.
It most likely wont explode right away but the fumes from the heated pickle might put you on a mild high if you breathe it in a lot...
Answer:
The second one is a function. {(-8, -2), (7, -2),(-9,2), (0,0)
Explanation:
Its because the y-value is repeated twice.
Hope it helps.