K.C.S.E Physics Q & A - MODEL 2008PP1QN19

K.C.S.E Physics Q & A - MODEL 2008PP1QN19

​ a) State the principle of moments. 
b) A uniform metal strip is 3.0cm wide, 0.6cm thick d 100cm long. The density of the metal is 2.7 g/cm3.
(i) Determine the weight of the strip. 
The strip placed n a pivot and kept in equilibrium by forces as shown in fig. 13

​(ii) Determine the value of F and R 
(iii) X is the distance from the end of the plank to the point of application of force F. Force F is now applied at various points nearer to the pivot so that x increases. Equilibrium is maintained all the time. On the axes provided sketch the relation between force F and x.

​(iv) Give a reason for the answer in (iii) above 

answers