The figure below shows a sheet of material with the shape of an isosceles triangle. Mark its centre of gravity accurately showing how you arrive at the answer (1mk)
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K.C.S.E Physics Q & A - MODEL 2019PP1QN08
​Figure 4 shows a one meter long uniform rod of negligible weight supporting two weights.
​Determine the position of the fulcrum from 0 cm for the rod to remain in equilibrium.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN07
A student carrying a heavy box using the right hand is observed to lean towards the left hand side. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2018PP1QN11
​Figure 7 shows an L-shaped Wooden Structure
​On the diagram, construct appropriate lines to Show the position of the center of gravity for the structure
answer
K.C.S.E Physics Q & A - MODEL 2017PP1QN13
​Figure 3 shows two possible designs of a three legged stool.
​State a reason why B is more stable than A.
answer
K.C.S.E Physics Q & A - MODEL 2017PP1QN12
A uniform metre rule is pivoted at its centre. Two weights of 20 N and 10 N are suspended at the 20 cm and 100 cm marks respectively. Determine the position at which a 10 N weight should be suspended in order to balance the system.
answer
K.C.S.E Physics Q & A - MODEL 2017PP1QN05
​Figure 1 shows a uniform wooden bar at equilibrium with two cans Y and Z of equal mass but different diameters.
​The cans are simultaneously filled with equal volumes of water.
Explain the observation made.
answer
K.C.S.E Physics Q & A - MODEL 2016PP1QN11
Figure 9 shows a uniform cardboard in the shape of parallelogra
​Locate the centre of gravity of the cardboard
answer
K.C.S.E Physics Q & A - MODEL 2015PP1QN11
A person carrying a heavy luggage using one hand leans away from the luggage. State the reason for this.
ANSWER
K.C.S.E Physics Q & A - MODEL 2014PP1QN09
​Figure 6 shows two identical rods JK and LK connected with a hinge at K.
​The position of the centre of gravity for the system is at P. The arrangement is now adjusted so that J and L move equal distances towards O. Sketch the new arrangement on the same diagram and mark the new position of the centre of gravity.
answer
K.C.S.E Physics Q & A - MODEL 2014PP1QN08
​Figure 5 shows a tin uniform rod 4 m long and of mass 2 kg. h is pivoted 1 m from one end and balanced horizontally by a string attached near the other end
​Determine the position where a mass of 5 kg should be placed on the rod so that the rod remains horizontal and the tension in the string is zero.
answer
K.C.S.E Physics Q & A - MODEL 2013PP1QN08
Figure 4 shows a uniform metre rule of weight 1 N with two weights of 0.18 N and 0.12 N suspended from its ends.
​Determine how far from the 0.18 N weight a pivot should be placed in order to balance the meter rule.
answer
K.C.S.E Physics Q & A - MODEL 2012PP1QN09
State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.
ANSWER
K.C.S.E Physics Q & A - MODEL 2011PP1QN01
Figure 1 shows a lorry moving on an inclined section of a straight road. At the back is a chain hanging from a point on a horizontal axis through the centre of gravity of the lorry.​
​State with a reason whether the lorry is stable or not stable.
ANSWER
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 2009PP1QN09
​Figure 4 shows a uniform cardboard in the shape of parallelogram
​Locate the centre of gravity of the cardboard
ANSWER
K.C.S.E Physics Q & A - MODEL 2008PP1QN14
​The system in Fig. 8 is in equilibrium
​When the temperature of the water is raised the system is observed to tilt to the right, state the reason for this observation.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN10&11
Fig. 5 shows a toy resting on top of a closed bottle. Use the information on the figure to answer questions 10 and 11.​
Mark on the diagram, point Q, the approximate centre of gravity of the toy.
Giving a reason, name the state of equilibrium of the toy.
answers
K.C.S.E Physics Q & A - MODEL 2007PP1QN08
​Figure 5 shows a uniform bar of length 1.0 m pivoted near one end. The bar is kept in equilibrium by a spring balance as shown.
Given that the reading of the spring balance is 0.6 N. Determine the weight of the bar.
answer
K.C.S.E Physics Q & A - MODEL 2006PP1QN12
​The uniform bar in figure 7 is provided at its midpoint. It is in equilibrium under the action of two identical balloons filled with equal volumes of different light gases at the same temperature.
Explain why the bar may not remain in equilibrium if the temperature of the surrounding changes.
ANSWER
K.C.S.E Physics Q & A - MODEL 2005PP1QN03
​The light uniform bar in Fig 3 is equilibrium. The two beakers A and B contain water at the same temperature. The two blocks are made of the same material.
​If the temperature of the water in beaker A is now raised, explain why the beam tips to side A.
Assume the solid does not expand.
answer
K.C.S.E Physics Q & A - MODEL 2005PP1QN02
​ Fig 2 shows a solid cylinder standing on a horizontal surface. The cylinder is in stable equilibrium
​On the horizontal space provided, sketch the cylinder in neutral equilibrium
answer
K.C.S.E Physics Q & A - MODEL 2004PP1QN14
​The system in figure 9 is in equilibrium.
Determine the weight if the bar.
answer
K.C.S.E Physics Q & A - MODEL 2004PP1QN03
​ Fig 3 shows a rectangular block of wood with a hollow section (inside) at the position shown.
The block is resting on a Horizontal bench
​(i) State the effected on the stability of the block when the hollow section is filled with water.
ii) Explain your answer in (i) above.
answers
i)Stability reduced/Lower /less stable
(ii)Upper section heavier/hollow section becomes heavy/more massive top Raising the c.o.g of the block. K.C.S.E Physics Q & A - MODEL 2004PP1QN02
​The system in figure 2 is in equilibrium at room temperature.
The system is taken outside where the temperature is 10°c higher for sometime. 
Explain why it tips to the right immediately it is returned to the room
answer
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M.A NyamotiMy passion is to see students pass using right methods and locally available resources. My emphasis is STEM courses
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