Use the Parallelogram Rule to Find the Magnitude of the Resultant

question 145

Multiple Choice

Use the parallelogram rule to find the magnitude of the resultant force for the two forces shown in the figure. Round to
one decimal place.
-Suppose you would like to cross a 211-foot wide river in a boat. Assume that the boat can travel 34 mph relative to the water and that the current is flowing west at the rate of $5 \mathrm { mph }$ . If the bearing is chosen so that the boat will land at a point exactly across from its starting point, how long will it take for the boat to make the crossing? Give your answer to the nearest second.

• A) \(9 \mathrm { sec }\)
• B) \(4 \mathrm { sec }\)
• C) \(2 \mathrm { sec }\)
• D) \(17 \mathrm { sec }\)

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Definitions:

Spatial Rearrangements

Changes or modifications in the position or arrangement of objects in space.

Conservation-of-Number Task

A cognitive test used in developmental psychology to assess a child's understanding that a quantity does not change despite changes in its shape or arrangement.

Experimenter's Longer Row

An experimental setup often used in cognitive psychology to study perception and cognitive biases, where participants may perceive a row of objects as longer due to its arrangement or context.

Maze Task

A cognitive experiment or test involving navigating through a labyrinth, used to assess memory, learning, and problem-solving abilities.