Devoir
SHORT TEST
Conditions d'achèvement
Opened: dimanche 31 décembre 2023, 00:00
Due: dimanche 7 janvier 2024, 00:00
A swimmer is crossing a river with a width of L = 1 km, moving from one bank to the other perpendicular to the current at a constant velocity v = 4 km/h. The current velocity is = 2 km/h.
- What do these two velocities represent?, Write their analytical expressions in the Cartesian coordinate system (xoy).
- Calculate the angle at which the swimmer deviates.
- Determine the swimmer's trajectory, velocity, and the time required to reach the opposite bank.
- If the swimmer intends to reach a point directly opposite the starting bank, what should be the initial direction? Calculate the time needed to reach the opposite bank under these conditions.