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Question 1:

What is displacement in the context of motion?

A) The total distance traveled
B) The change in position of an object
C) The speed of an object
D) The rate of change of velocity

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Explanation: The correct answer is B) The change in position of an object. Displacement is a vector quantity that represents the change in position of an object. It includes both the magnitude (distance) and direction of the change in position.

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Question 2:

Which of the following is a scalar quantity?

A) Displacement
B) Velocity
C) Acceleration
D) Speed

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Explanation: The correct answer is D) Speed. Speed is a scalar quantity that represents the magnitude of velocity, without regard to direction. Displacement, velocity, and acceleration are all vector quantities that include both magnitude and direction.

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Question 3:

If an object is moving in the positive direction with a constant velocity, what can be said about its acceleration?

A) The acceleration is zero
B) The acceleration is positive
C) The acceleration is negative
D) It depends on the mass of the object

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Explanation: The correct answer is A) The acceleration is zero. When an object is moving with a constant velocity, its acceleration is zero. This is because acceleration is the rate of change of velocity, and if the velocity is constant, there is no change in velocity over time.

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Question 4:

What is the relationship between displacement, average velocity, and time interval?

A) Displacement = Average velocity / Time interval
B) Displacement = Average velocity * Time interval
C) Displacement = Average velocity + Time interval
D) Displacement = Average velocity - Time interval

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Explanation: The correct answer is B) Displacement = Average velocity * Time interval. The relationship between displacement, average velocity, and time interval can be expressed by the equation Displacement = Average velocity * Time interval. This equation shows that the displacement is equal to the product of the average velocity and the time interval over which the motion occurs.

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Question 5:

If an object is moving in the positive direction and experiencing a negative acceleration, what can be said about its velocity?

A) The velocity is increasing
B) The velocity is decreasing
C) The velocity is constant
D) It depends on the mass of the object

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Explanation: The correct answer is B) The velocity is decreasing. If an object is moving in the positive direction but experiencing a negative acceleration, it means that the object is slowing down. The negative acceleration acts opposite to the direction of motion, causing the velocity to decrease over time.