Physics, 16.10.2020 07:01 dragon2565

Which of the cars has a displacement North of its initial position? A car travels North for 5 miles, turns around and returns to the starting position.
A car travels North for 5 miles, turns around and returns to the starting position.

A car travels South for 5 miles, turns around and returns to the starting position.
A car travels South for 5 miles, turns around and returns to the starting position.

A car travels North for 5 miles, turns around and travels South for 8 miles.
A car travels North for 5 miles, turns around and travels South for 8 miles.

A car travels South for 5 miles, turns around and travels North for 8 miles.

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Answer from: Mimix2k

The correct answer is A car travels South for 5 miles, turns around, and travels North for 8 miles.

Explanation:

Displacement is determined by the change in position. This means there is displacement if the initial position of a body such as a car is different from the final position. Also, the displacement is considered in terms of direction (North, South, East, West). In this context, if a car travels South or North and then returns to its initial position there is no displacement.

According to this, the only option that shows a displacement North is "A car travels South for 5 miles, turns around and travels North for 8 miles" because in this case, the car had a change in position as it first moved 5 miles south (a displacement of 5 miles South) and then 8 miles north, which changes the displacement to 3 miles North (5 miles South - 8 miles North = 3 miles North).

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Answer from: Quest

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

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Which of the cars has a displacement North of its initial position? A car travels North for 5 miles...

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