Answer:
a. α = 2.0 rad/s^2
b. 10rad/s
c. 5rad/s
d. 75rad
Explanation:
Assume that the sense of rotation is positive.
This means that w, α, and other quantities will then be positive also.
a. As we already know
25 rad = 1/2 α 5^2
α = 2.0 rad/s^2
b. w instant = (2.0rad/s^2) * 5s = 10rad/s
c. w avg = Δθ/Δt = 25rad/5s = 5rad/s
d. θ = wo + 1/2αt^2
= 0 + 1/2(2rad/s^2)(10s)^2 = 100 rad
Hence we calculate displace between t = 5s and t = 10s as
Δθ = (100-25)rad = 75rad
