Given: <span>ω(t) = 8.00 - 0.2*t^2
Differentiating both sides with respect to time we get:
angular acceleration = </span>α(t) = -0.2 * 2 *t
At t = 6.8 sec,
angular acceleration = α(t) = -0.2 * 2 *6.8 = -2.72 rad/s^2
Answer:
C, 4.5 billion years ago, i think
Explanation:
Answer:
s = 0.9375 m (to the left)
Explanation:
We have to find the center of mass in every case
Xcm initial = (75Kg*0m+25Kg*3m+60Kg*1.5m)/(75+25+60)Kg = 1.03125m
Xcm final = (25Kg*0m+75Kg*3m+60Kg*1.5m)/(75+25+60)Kg = 1.96875m
Variation: S = 1.96875m - 1.03125m = 0.9375 m
