Answer:
4. A
5. D
Explanation:
4) Apply Newton's second law in the radial direction (towards the center):
∑F = ma
T = mv²/r
v = √(Tr/m)
Given T = 30 N, r = 1.5 m, m = 2 kg:
v = √(30 N × 1.5 m / 2 kg)
v = 4.74 m/s
5) Apply Newton's second law to the stopper in the radial direction (towards the center):
∑F = ma
T sin θ = Mv²/(L sin θ)
T = Mv²/(L sin² θ)
