To model a spacecraft, a toy rocket engine is securely fastened to a large puck, which can

Question:

To model a spacecraft, a toy rocket engine is securely fastened to a large puck, which can glide with negligible friction over a horizontal surface, taken as the xy plane. The 4.00-kg puck has a velocity of 300ˆi m/s at one instant. Eight seconds later, its velocity is to be (800i + 10.0j) m/s. Assuming the rocket engine exerts a constant horizontal force, find
(a) The components of the force and
(b) Its magnitude.