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Sagot :
Alice's speed relative to the water should be 0.6 m/s in order to target the spot 90 meters south of the starting point on the bank of the other side.
What is relative velocity?
Relative velocity refers to the velocity of an object with respect to another observer.
Velocity is speed in a given direction and is a vector quantity.
- Velocity = displacement/time
There is relative velocity between Alice and the water.
Let Alice's velocity relative to the river be x
Time it will take her to cross the river = 45/x
The displacement of the river in that time is given below as;
Displacement = velocity * time
Velocity of river = 1.20 m/s
time, t = 45/x
d = 90 m
90 = 1.2 * 45/x
90x = 54
x = 54/90
x = 0.6 m/s
Therefore, Alice's speed relative to the water should be 0.6 m/s.
In conclusion, relative velocity is the velocity of one object from the reference point of another object.
Learn more about relative velocity at: https://brainly.com/question/24104949
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