1.1. Fig. 3.1 shows the horizontal forces acting on a swimmer.

(i) Calculate the size and direction of the resultant horizontal force on the swimmer.  

size of resultant horizontal force = ...................................................... N

direction of resultant horizontal force = ......................................................    

[1]

(ii) State the name of the 110 N force on the swimmer.

[1]

(iii) Fig. 3.2 shows the horizontal forces acting on the swimmer as he moves forwards a short time later.

Describe and explain the motion of the swimmer.

[2]

1.2. Another swimmer weighs 700N. He stands on a diving board, as shown in Fig. 3.3.

Calculate the moment of the swimmer’s weight about point P.

moment = ...................................................... N m