QU1:A particle is projected from a point  P(2,0,0)  with a velocity 10m/s making an angle 45 degrees with the horizontal . The plane of projectile motion
through a horizontal  line PQ which  makes an angle of 37 degrees with the +ve X-axis, XY-plane is horizontal .The coordinates of the point where
the particle will strike the line PQ is (taking g=10m/(sec)2):-
(a) (10,6,0)
(b) (8,6,0)
(c) (10,8,0)
(d) (6,10,0)

QU2:Is it possible to have a collision in which all of the K.E. is lost ?
QU3:Explain how linear momentum is conserved when a ball bounces from floor.
QU4:Do you know how to determine whether a force is conservative or not from vector representqtion of a force. For example I give you this question :-
         e.g.A force F=5zi+xyj+x2zk is :-
               a)is conservative
               b)is non-conservative
               c)is conservative along some paths
               d)may be conservative or non conservative depending upon x,y,z
              [NOTE: Here i,j,k stands for i cap,,j cap and k cap respectively and there is an arrow (representing vector) over F.Also, x2 means x to the
               power 2 here.]