Question

Please show work

1. A 0.25 km wide river has a uniform flow speed of 4.2 m/s toward the east. It takes 23 s for a boat departing from the south bank to travel straight across the river to a position directly north of its departure. a) In what direction must the boat be pointed so as to accomplish this? Express your final answer relative to the North direction. (Hint: Start by drawing a right triangle representing the vector addition) b) What is the magnitude of the propulsion speed of the boat relative to the water? 2. A remote control car's velocity vector is given by the following expression. u(t)-(3°-12)i-5f a) b) Find an expression for the car's acceleration vector as a function of time (in unit vector notation) Find an expression for the car's displacement vector from its original position as a function of time. the time when the car is traveling directly south.

Answer 1

0 2.3 2. S34 3 4 nne и t ") ve loc.hy Ai tevb st 12t)i-St)