Answer:
α = 2.6 +1.7 t - 0.14 t³
Explanation:
Given that
ω(t) = at + bt² - ct⁴
where a = 2.6 rad/s², b = 0.85 rad/s³ and c = 0.035 rad/s⁵
We know that angular acceleration is the rate of change of angular velocity
α = dω/dt
ω(t) = at + bt² - ct⁴
dω/dt= a + 2 b t - 4 ct³
So
α = a + 2 b t - 4 ct³
By putting the values of a b and c
α = a + 2 b t - 4 ct³
α = 2.6 + 2 x 0.85 t - 4 x 0.035 t³
α = 2.6 +1.7 t - 0.14 t³
We can take as positive direction the direction of the train, and as negative direction the direction of the girl. The speed of the train relative to the girl will be given by the difference between the two velocities:
which means
Answer:
Explanation:
The velocity is 340, but the distance is not. Here's how you do this:
You need to find out the velocity of the that sound in that temp which has a formula of
v = 331.5 + .606T where T is the temp in Celcius. Filling in and using the correct number of sig dig:
v = 331.5 + .606(20) and
v = 331.5 + 10 and
v = 340 m/s. Now we need to use that in d = vt:
d = 340(2.00) so
d = 680 m
Kinetic energy decreases if either the mass or the velocity of the object decreases or if both decrease. and Kinetic energy increases if either the mass or the velocity of the object increases or if both increase.
Explanation:
