1. A stone is thrown horizontally without air resistance and follows the path XYZ. What is the direction of the accelera

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1 A Stone Is Thrown Horizontally Without Air Resistance And Follows The Path Xyz What Is The Direction Of The Accelera 1 (210.96 KiB) Viewed 47 times

1. A stone is thrown horizontally without air resistance and follows the path XYZ. What is the direction of the acceleration of the stone at point Y? (A) ! (B) (C) (D) (E) 2. Acceleration is always in the direction (A) of the displacement. (B) of the initial velocity. (C) of the instantaneous velocity. (D) of the net force. (E) opposite to the frictional force. 3. A cannon fires a projectile with no air re- sistance; points MNOP correspond to one second intervals. The dashed line shows the trajectory in the absence of gravity. Using 9-10 m/s2, what are the lengths X, Y, Z? MX Y Z NO (A) 5m, 10m, 15 m (B) 5m, 20m, 45 m (C) 10m, 40 m, 90 m (D) 10m, 20m, 30 m