1.     Mary can run at a top speed of 4.2m/s, whereas Deema can run only at 3.4m/s. They are to race a distance of 200m, starting at the same point. If the race is to end in a tie, how much sooner should Deema start running before Mary does.

A bullet is horizontally shot out of a window 42m above the ground at 120m/s. Calculate how far it lands from the base of the building and its resultant velocity with which it hits the ground. Draw the trajectory and the velocity vector at any point.

 Calculate the tension in cable holding the buoy under the ocean as shown in the diagram opposite. The volume is 0.15 and mass is 135 kg. the density of seawater is 1030