A pendulum, consisting of a bob of mass m hung from a massless string, is attached on the ceiling of a room in a ship. When the ship is at rest, the pendulum makes zero degrees with the vertical. The ship starts to accelerate and the pendulum now makes at angle 5 with the vertical. The acceleration of the ship is (Taking g = 9.8 m/s, tan 5 = 0.09) 0.98 m/s 0.88 m/s 0.68 m/s 0.78 m/s