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) Is work a vector or scalar? Define “energy”. A wooden sphere of mass 0.15 kg is thrown
with a velocity of 30 ms-1 .Find the kinetic energy of the sphere. (4-marks )
(b) Define “work” . Write down the unit of work in SI system. A woman push a child, who is
riding a tricycle, with a 200N force. The tricycle moves a distance of 2m and the work done
by the woman is 100J. Find the angle between the force and the displacement. (4-marks )

1. (a) Define speed and velocity such that the two may be distinguished. An object moves with
   an initial velocity of 4ms-1 . If it moves with a uniform acceleration of 2ms-2 find the
   displacement after 20 s. (4-marks )
   (b) A body moving with a constant acceleration reach the velocity 4ms-1 after 10s. If the
   body start from rest , find the velocity after (a) 12s (b) 14s (c) 16s (d) 18s. Draw the
   velocity time graph for the interval 10 s to 18 s. From the graph , find the velocities at
   8s and 20s. (4marks )
   Match each of the items in List A with the appropriate items in the list B. (7 marks)
   List A List B
   (a) Neutralization (i) it dissolves in noble metal gold
   (b) Alum (ii) CaO Cl2.2 H2O
   (c) Ammonium iron (II) sulphate (iii) show allotropy
   (d) Aqua-regia (iv) reaction between any acid and a base
   (e) Sulphur (v) dissociation constant of the indicator
   (f) Bleaching powder (vi) K2SO4. Al2(SO4)3.24 H2O
   (g) Kin (vii) (NH4)2 SO4.FeSO4.6H2O
2. Define the following terms. (8 marks)