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A car starts from rest and uniformly accelerates to a speed of 40 km/h in 5 s. The car moves south the entire time.

Which option correctly lists a vector quantity from the scenario

A. distance: 40 km

B. acceleration 8 km/h/s south

C. velocity: 5 km/h north

D. speed: 40 km/h

User Bonnie
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1 Answer

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Answer:

The correct option that lists a vector quantity from the scenario is B. acceleration 8 km/h/s south.

A vector quantity has both magnitude and direction, and acceleration is a vector quantity. In this scenario, the car accelerates uniformly, meaning that its acceleration is constant in magnitude and direction. The acceleration is given as 8 km/h/s south, which means that its magnitude is 8 km/h/s and its direction is south.

The other options are not vector quantities because they either have no direction (distance and speed) or the direction is given as a scalar instead of a vector (velocity). The distance traveled by the car is a scalar quantity and has no direction associated with it. The speed of the car is also a scalar quantity and only gives information about the magnitude of the car's velocity, but not its direction. The velocity of the car is given as 5 km/h north, but it is not a vector quantity because it does not give information about the rate of change of velocity with respect to time (i.e., acceleration).

Explanation:

I tried all my best to answer.Thank You

User PEHLAJ
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