1) From a balcony a child fires a toy arrow down to the ground below. The arrow has initial speed 8 m/s and is aimed at an angle of 40 below the horizontal. The arrow takes 0.9 seconds to hit the ground. a) Calculate the initial horizontal (x) and vertical (y) velocity components of the arrow. (2 points) b) Calculate the height of the balcony. (3) 2) A distant planet has mass 6.2 x 1023 kg and radius 3.5 x 10 m. A cat weighs 15 N on the surface of this planet. Calculate the mass of the cat