John was out running and got distracted looking at the sky, when all of a sudden he bumped into
someone and fell to the ground. As they were falling, they were "stuck" together. John has a mass
of 85kg and the person he bumped into (Emily), has a mass of 67kg. Assuming John crashed into
Emily with an initial velocity of 2.2m/s, how fast did they both fall to the ground?