K.C.S.E Physics Q & A - MODEL 1997PP2QN04

K.C.S.E Physics Q & A - MODEL 1997PP2QN04

Figure 4 shows a force- distance graph for a car being towed on a horizontal groun

(a) Calculate the total work done
(b) If the velocity just before reaching point D is 0.6ms-1, calculate the power developed by the agent providing the force at this point.
(c) An electric pump can raise water from a low level reservoir to the higher – level reservoir at the rate of 3.0 x 105 kg per hour. The vertical height of the water raised 360m. If the rate of energy loss in form of heat is 200KW, determine the efficiency of the pump

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