nsep kio

quantities like velocity and force cannot be added.
(c) Linear motion has only one direction.
(c) The centre of gravity is at 0.5 x102 cm mark for a uniform metre rule.
work.
(c) The normal temperature is _____ ℉.
(d) The ice point is 0℃ in celsius scale and _____ K in kelvin scale.

1. In the equation s =v0t + 1/2at2 ,s,v0 and a are magnitudes of the respective vector quantities.
   Write down the equation in vector form.
   A vector of magnitude 5 units is inclined at an angle 37° to the x axis . Find the magnitudes
   of the vector components along x and y axis. ( 5- marks )

2. Which of the following quantities are scalars and which are vectors?
   (a) speed (b) velocity (c) average velocity (d) acceleration (e) displacement.
   A particle starting from rest moves along a straight line with a constant acceleration of 2 ms-2.
   What is the velocity of the particle 9 s after it started from rest? ( 5- marks )

SECTION (B)
Answer ALL Questions
Answer any FOUR Questions

1. (a) 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 )