K.C.S.E Physics Q & A - MODEL 2014PP1QN16

K.C.S.E Physics Q & A - MODEL 2014PP1QN16

​Figure 10 shows a trolley of weight 20 N pulled by a force of 4 N from the bottom to the top of an inclined plane at a uniform speed.

​(a) (i) State the value of the force acting downwards along the inclined plane.
(ii) Explain how the value in part (a) (i) is obtained. 
(b) For the system. determine the:
(i) mechanical advantage; 
(ii) velocity ratio; 
(iii) efficiency. 

answers