Question 1. Which of the following is necessary to describe the position of an object?
(a) Only distance
(b) Only direction
(c) Distance and direction from a reference point
(d) Only speed
Answer:
(c) Distance and direction from a reference point
Explanation: The position of an object is described by its distance and direction with respect to a fixed reference point.
Question 2. An object is said to be in motion if its position changes with respect to:
(a) Time only
(b) A reference point with time
(c) Its colour
(d) Its mass
Answer:
(b) A reference point with time
Explanation: Motion means change in position with time with respect to a reference point.
Question 3. Which of the following is an example of motion in a straight line?
(a) A stone tied to a string moving in a circle
(b) A train moving on a straight track
(c) The hands of a clock
(d) A merry-go-round
Answer:
(b) A train moving on a straight track
Explanation: A train moving on a straight track follows a straight path, so it is linear motion.
Question 4. Distance travelled is a:
(a) Vector quantity
(b) Scalar quantity
(c) Negative quantity
(d) Directional quantity
Answer:
(b) Scalar quantity
Explanation: Distance has only magnitude and no direction.
Question 5. Displacement is a:
(a) Scalar quantity
(b) Vector quantity
(c) Quantity without direction
(d) Quantity always greater than distance
Answer:
(b) Vector quantity
Explanation: Displacement has both magnitude and direction.
Question 6. The SI unit of distance and displacement is:
(a) second
(b) metre
(c) metre per second
(d) metre per second square
Answer:
(b) metre
Explanation: Both distance and displacement are measured in metre.
Question 7. If an object returns to its starting point, its displacement is:
(a) Maximum
(b) Equal to distance
(c) Zero
(d) Negative always
Answer:
(c) Zero
Explanation: Displacement is the shortest distance between initial and final positions. If both positions are the same, displacement is zero.
Question 8. Which of the following can never be negative?
(a) Displacement
(b) Velocity
(c) Acceleration
(d) Distance
Answer:
(d) Distance
Explanation: Distance is the total path covered and is always positive or zero.
Question 9. The magnitude of displacement is always:
(a) Greater than distance
(b) Less than or equal to distance
(c) Equal to speed
(d) Equal to acceleration
Answer:
(b) Less than or equal to distance
Explanation: Displacement is the shortest distance between initial and final positions, so its magnitude cannot be greater than distance.
Question 10. Average speed is calculated by:
(a) Displacement ÷ time
(b) Total distance travelled ÷ time interval
(c) Velocity ÷ time
(d) Acceleration × time
Answer:
(b) Total distance travelled ÷ time interval
Explanation: Average speed tells how fast an object moves and is calculated using total distance.
Question 11. Average velocity is calculated by:
(a) Distance ÷ time
(b) Displacement ÷ time interval
(c) Speed × time
(d) Acceleration ÷ time
Answer:
(b) Displacement ÷ time interval
Explanation: Average velocity depends on displacement and time.
Question 12. The SI unit of average speed is:
(a) m
(b) s
(c) m s⁻¹
(d) m s⁻²
Answer:
(c) m s⁻¹
Explanation: Speed = distance/time, so its SI unit is metre per second.
Question 13. If a car covers equal distances in equal intervals of time, it is in:
(a) Non-uniform motion
(b) Uniform motion
(c) Circular motion only
(d) Oscillatory motion
Answer:
(b) Uniform motion
Explanation: Uniform motion means covering equal distances in equal intervals of time.
Question 14. If a car covers unequal distances in equal intervals of time, it is in:
(a) Uniform motion
(b) Non-uniform motion
(c) Rest
(d) Zero displacement
Answer:
(b) Non-uniform motion
Explanation: In non-uniform motion, the object covers unequal distances in equal intervals of time.
Question 15. A person walks 100 m east and then 100 m west. His displacement is:
(a) 100 m
(b) 200 m
(c) 0 m
(d) 50 m
Answer:
(c) 0 m
Explanation: The person returns to the starting point, so displacement is zero.
Question 16. A person walks 100 m east and then 100 m west. His total distance travelled is:
(a) 0 m
(b) 100 m
(c) 200 m
(d) 50 m
Answer:
(c) 200 m
Explanation: Total distance = 100 m + 100 m = 200 m.
Question 17. Average acceleration is:
(a) Change in position ÷ time
(b) Change in velocity ÷ time interval
(c) Distance ÷ time
(d) Displacement ÷ speed
Answer:
(b) Change in velocity ÷ time interval
Explanation: Acceleration is the rate of change of velocity.
Question 18. The SI unit of acceleration is:
(a) m
(b) m s⁻¹
(c) m s⁻²
(d) s
Answer:
(c) m s⁻²
Explanation: Acceleration = velocity/time, so its unit is m s⁻².
Question 19. If velocity of an object is constant, its acceleration is:
(a) Zero
(b) Maximum
(c) Negative always
(d) Equal to speed
Answer:
(a) Zero
Explanation: Acceleration occurs only when velocity changes.
Question 20. A bus moving fast on a straight road with constant velocity has:
(a) High acceleration
(b) Zero acceleration
(c) Negative displacement
(d) Zero speed
Answer:
(b) Zero acceleration
Explanation: Even if the bus is moving fast, acceleration is zero if velocity is constant.
Question 21. When the speed of an object decreases, acceleration is usually:
(a) In the direction of velocity
(b) Opposite to the direction of velocity
(c) Always zero
(d) Equal to distance
Answer:
(b) Opposite to the direction of velocity
Explanation: When speed decreases, acceleration acts opposite to the direction of motion.
Question 22. Acceleration due to gravity near Earth’s surface is approximately:
(a) 9.8 m s⁻¹
(b) 9.8 m s⁻²
(c) 98 m s⁻¹
(d) 0 m s⁻²
Answer:
(b) 9.8 m s⁻²
Explanation: Acceleration due to gravity is denoted by g and has value about 9.8 m s⁻².
Question 23. In a position-time graph, time is usually taken on:
(a) y-axis
(b) x-axis
(c) Both axes
(d) No axis
Answer:
(b) x-axis
Explanation: In motion graphs, time is usually represented on the x-axis.
Question 24. The slope of a position-time graph gives:
(a) Acceleration
(b) Distance
(c) Velocity
(d) Force
Answer:
(c) Velocity
Explanation: Slope of position-time graph = change in position/change in time = velocity.
Question 25. A straight line position-time graph shows:
(a) Constant velocity
(b) Changing velocity
(c) Zero distance always
(d) Circular motion
Answer:
(a) Constant velocity
Explanation: A straight line position-time graph means position changes equally in equal intervals of time.
Question 26. A curved position-time graph shows:
(a) Object at rest
(b) Constant velocity
(c) Changing velocity
(d) Zero speed
Answer:
(c) Changing velocity
Explanation: A curved position-time graph indicates accelerated motion.
Question 27. A horizontal position-time graph shows that the object is:
(a) Moving fast
(b) Accelerating
(c) At rest
(d) Moving in a circle
Answer:
(c) At rest
Explanation: A horizontal position-time graph means position is not changing with time.
Question 28. The slope of a velocity-time graph gives:
(a) Displacement
(b) Acceleration
(c) Distance
(d) Position
Answer:
(b) Acceleration
Explanation: Slope of velocity-time graph = change in velocity/change in time = acceleration.
Question 29. The area under a velocity-time graph gives:
(a) Acceleration
(b) Displacement
(c) Mass
(d) Time
Answer:
(b) Displacement
Explanation: Area under velocity-time graph represents displacement.
Question 30. A horizontal velocity-time graph indicates:
(a) Constant velocity
(b) Constant acceleration
(c) Increasing velocity
(d) Decreasing velocity
Answer:
(a) Constant velocity
Explanation: If the graph is parallel to the time axis, velocity does not change.
Question 31. A velocity-time graph sloping upward represents:
(a) Decreasing velocity
(b) Increasing velocity
(c) Zero velocity
(d) Rest
Answer:
(b) Increasing velocity
Explanation: Upward slope shows that velocity increases with time.
Question 32. A velocity-time graph sloping downward represents:
(a) Increasing velocity
(b) Decreasing velocity
(c) Zero distance
(d) Constant speed only
Answer:
(b) Decreasing velocity
Explanation: Downward slope shows that velocity decreases with time.
Question 33. The equation v = u + at is used for motion with:
(a) Variable acceleration only
(b) Constant acceleration
(c) Circular motion only
(d) Zero time only
Answer:
(b) Constant acceleration
Explanation: Kinematic equations are valid for motion with constant acceleration.
Question 34. Which of the following is a kinematic equation?
(a) F = ma
(b) v = u + at
(c) P = VI
(d) W = mg
Answer:
(b) v = u + at
Explanation: This equation relates initial velocity, final velocity, acceleration, and time.
Question 35. Which kinematic equation is useful when time is not given?
(a) v = u + at
(b) s = ut
(c) v² = u² + 2as
(d) speed = distance/time
Answer:
(c) v² = u² + 2as
Explanation: This equation does not contain time.
Question 36. In uniform circular motion, speed is:
(a) Zero
(b) Constant
(c) Continuously decreasing
(d) Continuously increasing
Answer:
(b) Constant
Explanation: Uniform circular motion means motion in a circle with constant speed.
Question 37. In uniform circular motion, velocity changes because:
(a) Speed changes continuously
(b) Direction changes continuously
(c) Mass changes continuously
(d) Distance becomes zero
Answer:
(b) Direction changes continuously
Explanation: Velocity includes direction. In circular motion, direction changes at every point.
Question 38. In one complete circular revolution, displacement is:
(a) Equal to circumference
(b) Zero
(c) Equal to radius
(d) Equal to diameter always
Answer:
(b) Zero
Explanation: After one complete revolution, the object returns to its starting point, so displacement is zero.
Question 39. Distance travelled in one complete circular revolution of radius R is:
(a) R
(b) 2R
(c) πR
(d) 2πR
Answer:
(d) 2πR
Explanation: Distance in one revolution is equal to the circumference of the circle.
Question 40. In uniform circular motion, acceleration is present because:
(a) Speed is always increasing
(b) Direction of velocity changes continuously
(c) Distance is zero
(d) Object is at rest
Answer:
(b) Direction of velocity changes continuously
Explanation: Acceleration occurs when velocity changes. In uniform circular motion, speed is constant but direction changes continuously.
