Answer:
4.44 rad/s^2.
Explanation:
1 rev = 1.7 s
Converting rev/s to rad/s,
1/1.7 * 2pi
= 3.7 rad/s
r = 120 cm
= 1.2 m
The speed of the object travelling the circle is:
v = ω * r
But, ω = dθ / dt
The angle θ swept out in a circle,
θ = ω * t
The angular acceleration, α, of the particle is:
α = ω * r
= v^2/r
= 3.7 * 1.2
= 4.44 rad/s^2.
