K.C.S.E Physics Q & A - MODEL 2017PP1QN14
(a) A tape attached to an accelerating trolley passes through a ticker timer that makes dots on it at a frequency of 50Hz. The ticker timer makes 10 dots on a 10cm long tape such
that; the distance a between the first two dots is 0.5 cm and the distance b between the last two dots is 1.5cm. 
​(i) Determine the velocity of the trolley at:
(I) distance a, (II) distance b. (ii) Determine the acceleration of the trolley. (b) State with a reason what would be observed on the spacing between the dots on the tape when the trolley is made to move on a horizontal surface.
ANSWERS
​(b) The spacing reduces with time.
The trolley decelerates with time on a horizontal surface.
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K.C.S.E Physics Q & A - MODEL 2017PP1QN07
A stone is thrown vertically upwards. Sketch a graph of potential energy (y axis) against time as the stone moves until it hits the ground.
answer
K.C.S.E Physics Q & A - MODEL 2015PP1QN14
​(a) Figure 7 (drawn to scale) shows a section of tape after passing through a ticker timer operated at a frequency of 50 Hz. The tape is attached to a trolley moving in the direction shown
​(i) Determine the velocity between:
(I) P and Q: (II) X and Y. (ii) Determine the acceleration of the trolley. (b) Two bodies of masses 5 kg and 8 kg moving in the same direction with velocities 20 ms-1 and 15 ms-1 respectively collide inelastically. Determine the velocity of the bodies after the collision.
ANSWERS
K.C.S.E Physics Q & A - MODEL 2014PP1QN15
​ Figure 9 shows a velocity-time graph for the motion of a body of mass 2 kg
​(a) Use the graph to determine the:
(i) displacement of the body after 8 seconds. (ii) acceleration after point B; (iii) force acting on the body in part (a) (ii). (b) Sketch a displacement-time graph for the motion from point A to C
answers
K.C.S.E Physics Q & A - MODEL 2014PP1QN04
​Figure 2 shows a section of a curved surface ABCD. Point A is higher than point B while BCD is horizontal. Part ABC is smooth while CD is rough. A mass m is released from rest at A and moves towards D.
​State the changes ¡n the velocity of m between:
(a)B and C; (b) C and D.
answer
​(a) BC = Constant
(b) CD - decreasing |
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