(a) Two ships M and N, moving with constant velocities, have position vectors (3 i + 7 j) and (4 i + 5 J] respectively. If the velocities ofM and N are (5 i + 6)]
and ( i+ 3 J] and the distance covered by the ships after t seconds are in meters, find
i) MlJ
(ii) lNfNI, when t = 3 seconds.
(b) A particle is acted upon by forces F 1 = 5 i + pj, F2 = q r + j, F3 = -2p i + 3 j and
F4 = -4 i + qj, where p and q are constants. If the particle remains in equilibrium
under the action of these forces, find the values ofp and q.
(b) A particle is acted upon by forces F 1 = 5 i + pj, F2 = q r + j, F3 = -2p i + 3 j and
F4 = -4 i + qj, where p and q are constants. If the particle remains in equilibrium
under the action of these forces, find the values ofp and q.