Airplane a travels 1400 km at a certain speed. plane b travels 1000 km at a speed 50 km divided by h faster than plane a in 3 hrs less time. find the speed of each plane.

Aparticle initially located at the origin has an acceleration of = 2.00ĵ m/s2 and an initial velocity of i = 8.00î m/s. find (a) the vector position of the particle at any time t (where t is measured in seconds), (b) the velocity of the particle at any time t, (c) the position of the particle at t = 7.00 s, and (d) the speed of the particle at t = 7.00