K.C.S.E Physics Q & A - MODEL 2019PP1QN15

K.C.S.E Physics Q & A - MODEL 2019PP1QN15

​(a)Figure 6 shows n bottle top opener being used to open a bottle.

​Indicate on the diagram the direction of the load and the effort. 
(b) State two ways ¡n which an inclined plane can be made to reduce the applied effort when pulling a Load along the plane. 
(c) A block and tackle system has three pulleys in the upper fixed block and two pulleys in the lower movable block.
(i) Draw a diagram to show how the system can be set up in order to lift a load arid indicate the position of the load and effort.
(ii) State the velocity ratio of the set up. 
(iii) In such a block and tackle system an effort of 200N is required to lift a load of 600N. Determine its efficiency 

answers

​(b)Reducing the angle of inclination. 
 Reducing the friction — using rollers, lubricants etc.