what is acceleration? (pp. 22–23)
1. what is acceleration?
2. acceleration involves a change in either __________ or __________
3. any time the speed of an object increases, the object undergoes __________.
4. is the following sentence true or false? acceleration refers to increasing speed, decreasing speed, or changing direction.
5. deceleration is another word for negative __________
6. is the following sentence true or false? an object can be accelerating even if its speed is constant

Question

Accepted Answer

### Question 1: What is acceleration?
# Brief Explanations:
Acceleration in physics is defined as the rate at which an object changes its velocity. Velocity is a vector quantity that includes both speed (magnitude of velocity) and direction. So, acceleration occurs when there is a change in speed (either increasing or decreasing) or a change in direction of motion. In formula terms, it is $a=\frac{\Delta v}{\Delta t}$, where $\Delta v$ is the change in velocity and $\Delta t$ is the change in time. But for the conceptual answer, we can say it's the rate of change of velocity (or the process of speeding up, slowing down, or changing direction).
# Answer:
Acceleration is the rate at which an object changes its velocity (it can involve increasing speed, decreasing speed, or changing direction).

### Question 2: Acceleration involves a change in either ______ or ______.
# Brief Explanations:
From the definition of acceleration, since velocity has two components: speed (magnitude) and direction, a change in either of these components will result in a change in velocity, and thus acceleration. So the two blanks should be related to the components of velocity.
# Answer:
speed, direction (or direction, speed)

### Question 3: Any time the speed of an object increases, the object undergoes ______.
# Brief Explanations:
When the speed of an object increases, it means its velocity is changing (specifically the magnitude of velocity is increasing). According to the definition of acceleration, this is a form of acceleration (positive acceleration in the context of speed increase).
# Answer:
acceleration (or positive acceleration)

### Question 4: Is the following sentence true or false? Acceleration refers to increasing speed, decreasing speed, or changing direction.
# Brief Explanations:
As per the definition of acceleration, since velocity is speed with direction, a change in speed (increase or decrease) or a change in direction both result in a change in velocity, which is acceleration. So the statement is correct.
# Answer:
True

### Question 5: Deceleration is another word for negative ______.
# Brief Explanations:
Deceleration is the process of slowing down, which means the acceleration is in the opposite direction of the velocity. In terms of vectors, if we take the direction of velocity as positive, then deceleration is negative acceleration. So deceleration is negative acceleration.
# Answer:
acceleration

### Question 6: Is the following sentence true or false? An object can be accelerating even if its speed is constant.
# Brief Explanations:
Acceleration depends on the change in velocity. Velocity has both speed and direction. If an object is moving at a constant speed but changing direction (like a car moving in a circle at constant speed), its velocity is changing (because direction is changing), so it is accelerating. For example, uniform circular motion has constant speed but non - zero acceleration (centripetal acceleration) due to the continuous change in direction.
# Answer:
True

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Question 1: What is acceleration?

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Question 2: Acceleration involves a change in either or .