K.C.S.E Physics Q & A - MODEL 2010PP1QN15
​(a) A cyclist initially at rest moved down a hill without pedaling. He applied brakes and eventually stopped. State the energy changes as the cyclist moved down the hill.
(b) Figure 7 shows a mass of 30kg being pulled from point P to point Q, with a force of 200N parallel to an inclined plane. The distance between P and Q is 225m. In being moved from P to Q the mass is raised through a vertical height of 75m. (i) Determine the work done:
​I by the force;
II on the mass; III to overcome friction. (ii) Determine the efficiency of the inclined plane. (c) Suggest one method of improving the efficiency of an inclined plane
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K.C.S.E Physics Q & A - MODEL 2010PP1QN14
​Figure 6 shows an athlete lifting weights while standing with the feet apart
​Explain why standing with the feet apart improves the athletes' stability.
answer
K.C.S.E Physics Q & A - MODEL 2010PP1QN12
​Figure 5 shows a mass of 200g connected by a string through a hollow tube to a mass of 0.5kg.
The 0.5kg mass is kept stationary in the air by whirling the 200g mass round In a horizontal circle of radius 1 .0 metre.
​Determine the angular velocity of the 200g mass.
K.C.S.E Physics Q & A - MODEL 2010PP1QN11
​When a bicycle pump was sealed at the nozz1 and the handle slowly pushed towards the nozzle, the pressure of the air inside increased.
Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2010PP1QN10The weight of a solid in air is 5.ON. When it is fully immersed in a liquid of density 800Kgm-3 its weight is 4.04N.
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