K.C.S.E Physics Q & A - MODEL 2019PP1QN17
​(a) State what ¡s meant by Brownian Motion.
(b) Figure 8 shows the graph of velocity against time For a small steel ball Falling in a viscous liquid. 
​(i) Describe the motion of the steel ball as represented by part OA
(ii) Explain why the velocity of A and B is constant (c)A student throws a tennis ball vertically upwards from the ground and it lands back after 8 seconds.( acceleration due to gravity g =10m/s2) Determine the: (i) maximum height reached by the ball iii) velocity with which the ball hits the ground.
answers
​(a) Continuous random motion of particles.
(b) (i) It accelerates, velocity increases. (ii) As the ball falls through the fluid, the Viscous drag increases until the sum of the Viscous drag and the upthrust becomes equal the weight of the steel ball, hence the resultant force becomes zero. 
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K.C.S.E Physics Q & A - MODEL 2019PP1QN14
​(a) A student is provided with five 20g masses, a meter rule, a spring with a pointer, a stand a boss and a clamp.
(i) In the space provided, sketch a labelled diagram of the set up that may be used in order to verify Hooke’s law using these apparatus. (ii) State two measurements that should be recorded in order to plot a suitable graph so as to verify Hooke’s law. (iii) Describe how the measurements made in (ii) can be used to determine the spring constant. 
​(b) A helical spring stretches by 0.6cm when Supporting a weight of 40 g. Determine the extension when the same spring Supports a weight of 65 g.
answers
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K.C.S.E Physics Q & A - MODEL 2019PP1QN13
​ Two boxes E and F of masses 2.0 kg and 4.0 kg respectively arc dragged along a frictionless surface using identical forces. State with a reason which box moves with a higher velocity.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN12
Figure 5 shows two springs C and D of the same length and equal number of turns made from the same wire.
​State with a reason which of the two springs can support a heavier load before attaining the elastic limit.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN11
A stone of volume 800 cm3 experiences an upthrust of 6.5N when fully immersed in a certain liquid. Determine the density of the liquid.
answer
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