K.C.S.E Physics Q & A - MODEL 2011PP1QN16
Figure 11 shows a stone attached to the end of a string moving in a horizontal circle with a uniform speed of 2m/s. When the stone reaches point X on the circle, the string breaks.
(i) indicate on the diagram with an arrow, the direction of the motion of the stone when the string breaks.
(ii) State the magnitude of the velocity after the string breaks.
(iii) Give a reason for your answers in (i) and (ii).
(b) Figure 12 shows a lorry towing a trailer using a rope.
The lorry exerts a force N on the trailer and the trailer exerts an equal but opposite force M on the lorry. The frictional force between the trailer and the road is F.
Explain how the forces N, M and F enable the trailer to move.
(c) Figure 13 shows a frictionless trolley of mass 2kg moving with uniform velocity towards a wall. At the front of the trolley is a spring whose spring constant is 25N/m. The trolley comes to rest momentarily after compressing the spring by 3cm and then rebounds from the wall.
(I) the force exerted on the wall by the spring.
(II) the maximum acceleration of the trolley as it rebounds from the wall.
(ii) State the reason why the trolley acquires a constant velocity after it rebounds.
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 2009PP1QN19
(a) Define angular velocity
(b) Three masses are placed on a rotating table at distances 6 cm, 9 cm and 12 cm respectively from the centre of rotation. When the frequency of rotation is varied, it is noted that each mass slides off at a different frequency of rotation of the table. Table 1 shows the frequency at which each mass slides off
(i) State two factors that determine the frequency at which each mass slides off
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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