Suppose that a car traveling in the - x direction begins to slow down as it approaches a traffic light.Which statement concerning its acceleration in the x direction is correct?Group of answer choicesThere is not enough information to determine.Both its acceleration and its velocity are negative.Both its acceleration and its velocity are positive.Its acceleration is negative but its velocity is positive.Its acceleration is positive but its velocity is negative.
Question
Suppose that a car traveling in the - x direction begins to slow down as it approaches a traffic light.Which statement concerning its acceleration in the x direction is correct?Group of answer choicesThere is not enough information to determine.Both its acceleration and its velocity are negative.Both its acceleration and its velocity are positive.Its acceleration is negative but its velocity is positive.Its acceleration is positive but its velocity is negative.
Solution
The correct statement concerning its acceleration in the x direction is "Its acceleration is positive but its velocity is negative."
Here's why:
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The car is moving in the -x direction, which means its velocity is negative.
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The car is slowing down, which means it is decelerating or accelerating in the opposite direction of its motion. Since the car is moving in the -x direction, the opposite direction would be the +x direction. Therefore, its acceleration is positive.
So, the car has a negative velocity (because it's moving in the -x direction) and a positive acceleration (because it's slowing down or decelerating).
Similar Questions
3. What is the difference between positive and negative acceleration?
Which of the following statements are true regarding displacement, velocity, and acceleration for an object in 1-D motion? (Choose all that apply) Group of answer choicesIf an object is speeding up, then its acceleration has the same sign (positive or negative) as its velocity.If an object is speeding up, then the sign (positive or negative) of its acceleration is opposite to the sign of its velocity.If an object is slowing down, then the sign (positive or negative) of its acceleration is opposite to the sign of its velocity.If an object is slowing down, then its acceleration has the same sign (positive or negative) as its velocity.If an object is speeding up, then its displacement has the same sign (positive or negative) as its velocity.If an object is speeding up, then the sign (positive or negative) of its displacement is opposite to the sign of its velocity.If an object is slowing down, then its displacement has the same sign (positive or negative) as its average velocity.If an object is slowing down, then the sign (positive or negative) of its displacement is opposite to the sign of its average velocity.
A stone is thrown downward from a cliff. Take "up" to be the positive direction. Which of the following statements is true about the stone?Select one:a.The velocity is positive, the acceleration is positive, and the speed is positive.b.The velocity is positive, the acceleration is negative, and the speed is positive.c.The velocity is negative, the acceleration is negative, and the speed is positive.d.The velocity is negative, the acceleration is negative, and the speed is negative.
Determine if the car is accelerating. Note: Remember, in physics, acceleration includes slowing down. Something that's slowing down is accelerating in the direction opposite to its motion.Yes, downwardsYes, to the leftYes, to the rightNo, the car is not accelerating
An object moves in a circular path at a constant speed. Which of the following is true? A. The car’s acceleration is zero because it has a constant speed B. The car’s acceleration is not zero and causes the car to slow down C. The car’s acceleration is not zero and causes the car to speed up D. The car’s acceleration is not zero and causes the change in the direction of the car’s velocity E. None from the above
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