A car travels from point A to B in 3 hours and returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight highw

Question

A car travels from point A to B in 3 hours and returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight highway. Which of the following statements most accurately describes the motion of the car? Choose 1 answer:(Choice A) A The average velocity is 40 miles per hour. (Choice B) B The total displacement of the trip is 300 miles. (Choice C) C The average speed is 37.5 miles per hour. (Choice D) D The car travels at 50 mph for the first half and 30 mph for the second half.

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Thu Hương 3 years 2021-08-04T19:48:56+00:00 1 Answers 458 views 0

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    2021-08-04T19:50:23+00:00

    Answer: D

    Explanation:

    Given that a car travels from point A to B in 3 hours and returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight highway.

    From point A to B

    The speed = distance / time

    Where

    Distance = 150 mile

    Time = 3 hours

    Substitute the values into the formula

    Speed = 150/3 = 50 mile/ hours

    From Point B to Point A

    Distance = 150 miles

    Time = 5 hours

    Where speed = distance/ time

    substitute all the parameters into the formula

    Speed = 150/5 = 30 mph

    Therefore, The car travels at 50 mph for the first half and 30 mph for the second half.

    The correct answer is option D

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