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3 years ago

Why are velocity and acceleration called vector quantities?

Physics

2 answers:

Airida [17]3 years ago

4 0

Answer:because they both have magnitude and direction. Which can be identified from their SI Units.

Explanation:

because they both have magnitude and direction. Which can be identified from their SI Units.

Stella [2.4K]3 years ago

4 0

Answer:

Acceleration is a vector quantity because it has both magnitude and direction. When an object has a positive acceleration, the acceleration occurs in the same direction as the movement of the object.a change in the direction of motion results in an acceleration even if the moving object neither sped up nor slowed down. That's because acceleration depends on the change in velocity and velocity is a vector quantity — one with both magnitude and direction.Velocity as a Vector Quantity 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.

Explanation:

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2 years ago

Sally Leadfoot was pulled over on her way from Syracuse to Ithaca by an officer claiming she was speeding. The speed limit is 65

Citrus2011 [14]

Sally's average speed is <u>35.3 mi/h.</u>

Average speed of a body is the total distance traveled in the given time interval.

Express the distance d traveled in miles.

$d=\frac{97 km}{1.6 km/m\\i} \\ = 60 mi$

Express the time t traveled in hours.

$t =\frac{102 min}{60 min/hr}\\ = 1.7 h$

Calculate the average speed v.

$v =\frac{d}{t} \\ =\frac{60 mi}{1.7h} \\ = 35.3 mi/h$

Her average speed is 35.3 mi/h, which is less than the speed limit of 65 mi/h.

However, the average speed of an object is different from its instantaneous speed. It could be possible that at the time when the officer apprehended her, Sally could have been travelling at a speed greater than the prescribed speed limit, which would have prompted the officer to issue a speeding ticket to her.

Thus, the average speed of a person cannot be considered as a bench mark for speeding offences, since her instantaneous speed could have been higher than the speeding limit and yet she could have had an average speed less than the speeding limit.

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4 years ago