There are 2 question but the 2nd question solution is derive from the 1st question. 1. A box is sliding down a plane inclined at an angle of 20 degrees from the horizontal. Find the acceleration of the box, neglecting friction and air resistance. 2. A box that is hurled up the inclined plane starts up the plane with an initial velocity of 1000 cm/sec. Find the speed of the box moving up the plane 3 sec later.