Amazing Skills in Football

Which one of the following is not a football tournament?

A player kicks a football of mass 0.5 kg and the football begins to move with a velocity of 10 m/s . If the contact between the leg and the football lasts for (1)/(50) sec , then the force acted on the football should be

A boy kicks a football horizontally from the roof of a building of height 10m, . If the line joining the initial position of the football and the point where it hits the ground make an angle of 45^(@) with the ground, then find the displacement of the football

In the following example,try to identify the number of times the velocity of the ball changes: "A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team"? Also identify the agent supplying the force in each case.