Q 1. If the kinetic energy of a 6.2 kg falling rock is 2,290 J, the rock's speed is_______ m/s?

Q 2. Assume an asteroid is in the shape of a sphere and has a mass of 900 kilograms. Determine the density (in grams per cubic centimeter) of this asteroid if its diameter is known to be 0.9 meters.

1 kg = 1000 g, 1 m = 100 cm, volume of sphere = 4/3 (pi to the power of 3). Remember that the radius of a sphere is equal to half its diameter.