wheelbarrows

Diagram 5.1 and diagram 5.2 shows two different  situations of a farmer pushing wheelbarrows with different tyres .The masses in the two wheelbarrows are the same 

(a)	What is the force X acting on the wheelbarrow as shown in Diagram 5.1 Gravitational force/weight/ mg (clarify the symbols) …………..…………………………………………………………………………. [1 mark]
(b)	Based on Diagram 5.1 and Diagram 5.2 compare
	(i)	The weight of the two wheelbarrows. same …………………………………………………………………………… [1 mark]
	(ii)	The depth the tyres sink into the soil. Tyre in 5..2 sinks deeper into the soil / vice versa ……………………………………………………………………………. [1 mark]  (iii) The surface areas of the tyres. Tyre in 5.1 is broader/has a bigger surface area/ bigger area / reject tyre is bigger …………………………………………………………………. [1 mark]   (c) Name the physics quantity that causes the two tyres to sink at different depths into the soil as in b(i). pressure ……………………………………………………………………………… [1 mark] (d) Based on your answers to (b)(iii) and (c), state the relationship between the two physics quantities. The bigger the surface area the samller the pressure / pressure is indirectly prorpotional to surface area/ P = F/A clarify the symbols ……………………………………………………………………………. ……………………………………………………………………………. [1 mark] (e) A block of wood measuring 0.2 m x 0.3 m x 0.8 m of mass o 1.2 kg is placed on the surface of a table. Calculate the maximum pressure exerted by the wood on the table. Pressure  =    1.2 x 10      .                       0.2 x 0.3                =   200 N m-2 [2 marks]