📌 Physics Motion in a straight line Q&A
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1. What is the definition of rectilinear motion?
A) Motion in a circular path
B) Motion along a straight line
C) Motion with varying velocity
D) Motion along a curved path
Answer: B) Motion along a straight line
2. An object is in motion if:
A) It remains at rest
B) It changes position relative to a reference point
C) It moves in a circular path
D) Its speed remains constant
Answer: B) It changes position relative to a reference point
3. Which of the following is a scalar quantity?
A) Displacement
B) Velocity
C) Distance
D) Acceleration
Answer: C) Distance
4. Displacement refers to:
A) The total path length travelled by a body
B) The change in position of a body in a certain direction
C) The speed of an object
D) The average velocity of an object
Answer: B) The change in position of a body in a certain direction
5. How can the speed of an object be calculated?
A) Distance divided by time
B) Displacement divided by time
C) Velocity multiplied by time
D) Acceleration multiplied by time
Answer: A) Distance divided by time
6. Which of the following is true about velocity?
A) Velocity is always the same as speed
B) Velocity is a scalar quantity
C) Velocity includes both speed and direction
D) Velocity cannot be zero
Answer: C) Velocity includes both speed and direction
7. The average velocity is:
A) Displacement divided by time
B) Distance divided by time
C) Speed at a specific instant
D) Zero for uniform motion
Answer: A) Displacement divided by time
8. When is the average velocity the same as instantaneous velocity?
A) When the object is accelerating
B) When the object is in uniform motion
C) When the object changes direction
D) When the object is at rest
Answer: B) When the object is in uniform motion
9. Which of the following is true about acceleration?
A) Acceleration occurs only when an object speeds up
B) Acceleration can also occur when an object slows down
C) Acceleration does not depend on the direction of motion
D) Acceleration is not related to a change in velocity
Answer: B) Acceleration can also occur when an object slows down
10. Uniform motion refers to:
A) Motion with varying speed
B) Motion along a curved path
C) Motion along a straight line with constant velocity
D) Motion where the object is at rest
Answer: C) Motion along a straight line with constant velocity
11. The slope of a position-versus-time graph represents:
A) Acceleration
B) Instantaneous velocity
C) Distance
D) Average velocity
Answer: B) Instantaneous velocity
12. What is true about instantaneous velocity and average velocity if the velocity is constant?
A) Instantaneous velocity is always greater than average velocity
B) Instantaneous velocity is less than average velocity
C) Instantaneous velocity equals average velocity
D) Instantaneous velocity cannot be determined
Answer: C) Instantaneous velocity equals average velocity
13. Which of the following quantities is a vector?
A) Distance
B) Speed
C) Displacement
D) Time
Answer: C) Displacement
14. If an object moves with constant speed, what can be said about its velocity?
A) It is constantly changing
B) It has zero acceleration
C) Its displacement is zero
D) It is non-uniform
Answer: B) It has zero acceleration
15. What is the change in the position of a body called?
A) Distance
B) Displacement
C) Speed
D) Acceleration
Answer: B) Displacement
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