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mariarad [96]
3 years ago
6

To cross the river a swimmer chooses the direction minimizing the amount of time spent in the water. The swimmer swims at a cons

tant speed of 2.00 m/s. The river is flowing uniformly between the parallel banks 73.0 m apart at a constant flow speed of 8.00 m/s. Find the distance (in meters) downstream from the starting point where the swimmer will reach the opposite shore of the river.
Physics
1 answer:
Lynna [10]3 years ago
6 0

Answer:

304 meters downstream

Explanation:

The given parameters are;

The speed of the swimmer = 2.00 m/s

The width of the river = 73.0 m

The speed of the river = 8.00 m/s

Therefore;

The direction of the swimmer's resultant velocity = tan⁻¹(8/2) ≈ 75.96° downstream

The distance downstream the swimmer will reach the opposite shore = 4 × 73 = 304 m downstream

The distance downstream the swimmer will reach the opposite shore = 304 m downstream

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KE = PE

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The kinetic energy of the ball is calculated as follows:

KE = 1/2 · m · v²

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PE = m · g · h

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h = height.

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