(D) 49 N 3. A 4.0 kg block is sliding down a frictionless inclined plane as shown . What is the acceleration of the block? (A) 2.5m/s^2 (B) 5.5m/s^2 (C) 6.6m/s^2 (D) 8.1m/s^2 O. 559/9

(D)