A car starts from rest and moves along the path OAB as shown. It moves with a speed of 35 miles per hour along OA and 50 miles per hour along AB.
Which of the following is true about the car's velocity?
Group of answer choices
The velocity of the car remains constant throughout the journey.
The velocity of the car changes due to the change in speed and direction.
The change in direction alone causes the velocity of the car to vary.
The change in speed alone causes the velocity of the car to vary.
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this dumb
The picture above shows the Apollo spacecraft that took astronauts to the Moon in 1969. The spacecraft weighed
6.1 million pounds, and its motors produced 7.5 million pounds of thrust.
How did the spacecraft leave the surface of Earth?
A) The spacecraft produced an upward force of thrust that was equal to the
downward force of gravity.
B) The spacecraft produced an upward force of thrust that was greater than
the downward force of gravity.
C) The spacecraft produced a downward force of thrust that was equal to the
downward force of gravity.
The spacecraft produced a downward force of thrust that was less than the
Well, let me break it down for you. The car starts from rest and moves along path OAB. Along OA, it has a speed of 35 miles per hour, and along AB, it has a speed of 50 miles per hour. So, tell me, do you think the car's velocity remains constant throughout the journey? Or does it change due to the change in speed and direction? Maybe the change in direction alone causes the velocity to vary? Or is it just the change in speed alone that causes the velocity to vary? Take your time and choose wisely, this is not a speedy decision!
To answer this question, we need to understand the concept of velocity. Velocity is a vector quantity that includes both speed (magnitude) and direction. In this scenario, the car is moving with different speeds along the path OAB.
On the segment OA, the car is moving with a speed of 35 miles per hour. Since the car is moving in a straight line, its velocity is simply 35 miles per hour in the direction of OA.
However, when the car reaches point A and starts moving along AB, its speed increases to 50 miles per hour. At this point, both the speed and the direction of the car have changed. Consequently, the car's velocity has also changed.
Therefore, the correct answer is:
The velocity of the car changes due to the change in speed and direction.
What’s the answerrrr
no way to tell, since you do not say whether the direction changed.
But it's clearly not A.