Q1. A 1.15kg mass is attached to a light cord that is wrapped around a pulley of radius 5.05 cm that turns with negligible friction. The mass falls at a constant acceleration of 2.80 m/s^2. Find out the moment of inertia of the pulley.

Q2. You're in an airplane that flies horizontally with speed 1000 km/h (280m/s) when an engine falls off. Neglect air resistance suppose it takes 30s for the engine to hit the ground.
i) Show that the airplane is 4.5 km high.
ii) Show that the horizontal distance that the aircraft engine falls is 8400 m.
iii) if the airplane somehow continues to fly as if nothing had happened. Where is the engine relative to the airplane at the moment the engine hits the ground?