1. A mays whose mass is 70,000gram walks up to the fifth floor of a building. This is a vertical height of 1600cm above the ground. a) How many Joules of works does he do? b) If he climbs the stairs in 25 seconds, What is his rate of work in kilowatts ? 2. A ball is thrown upward and reached a high of 50m. Calculate a) its initial velocity? b) the time the ball reached its maximum high? 3. An arrow is shot into the air with a velocity of 100m/s at an elevation of 45 . Calculate a) The time of flight that arrow reached the maximum height? b) Maximum height reached by the arrow? c) The Range Note: Show diagram, given, unknown equation, derivation, substitution of values w/ units cancellatio of units and conversion