K.C.S.E Physics Q & A - MODEL 2012PP1QN12
State two reasons why the efficiency of a pulley system is always less than 100%.
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
K.C.S.E Physics Q & A - MODEL 2009PP1QN16
(a) Define the term efficiency of a machine
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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