How should I revise Chapter 2: Kinematics MCQs?

Read the textbook section first, solve the available MCQs without notes, then use the explanations and correct options to identify weak concepts.

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After completing this chapter, continue with the suggested next chapters shown near the end of the page.

Class 9 Physics Chapter 2: Kinematics MCQs With Explanations

Practice Class 9 Physics Chapter 2: Kinematics MCQs with explanations for Pakistani board exams. Includes solved objective questions, answer checking, chapter revision guidance and next chapter suggestions.

MCQs / Class 9 / Physics / Chapter 2: Kinematics

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Chapter 2: Kinematics Objective Preparation

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8Topics represented

Topics found: First Equation of Motion, Centripetal Acceleration, Vibratory Motion Example, Acceleration Determination, Nth Second Equation, Retardation Calculation, Instantaneous Velocity, Circular Motion Example

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Kinematics MCQs With Explanations

Q1. The first equation of motion is:

The first equation of motion relates final velocity, initial velocity, acceleration, and time: v = u + at.

Q2. A body is moving in a circular path with constant speed. Its acceleration is:

Centripetal acceleration always points toward the center, so its direction changes continuously even though magnitude remains constant.

Q3. The motion of a simple pendulum is an example of:

A simple pendulum oscillates about a fixed point, exhibiting to-and-fro motion characteristic of vibratory motion.

Q4. A body is moving with uniform acceleration. Its velocity after 5 seconds is 25 m/s and after 8 seconds is 34 m/s. The acceleration of the body is:

Acceleration = Δv/Δt = (34 - 25)/(8 - 5) = 9/3 = 3 m/s².

Q5. The distance covered by a body in the 5th second of its motion, starting from rest with uniform acceleration, is:

Using the formula for distance in the nth second, Sn = u + (a/2)(2n - 1), substituting u=0, a=a, and n=5 gives S5 = 0 + (a/2)(2*5 - 1) = 9a/2.

Q6. A body is moving with a velocity of 20 m/s. If it is brought to rest in 5 seconds, its retardation is:

Retardation = (change in velocity)/time = (20 - 0)/5 = 4 m/s².

Q7. The velocity of a body at any instant of time is called:

Instantaneous velocity is the velocity of a body at a specific instant in time.

Q8. The motion of a satellite around the Earth is an example of:

A satellite orbits Earth in a circular path, making it an example of circular motion.

Q9. If a body starts from rest and moves with uniform acceleration, the distance covered is proportional to the:

For uniform acceleration from rest, distance s = (1/2)at², so distance is directly proportional to the square of time.

Q10. The maximum height reached by the ball in the previous question is:

Using v² = u² - 2gh, 0 = 900 - 2×10×h → h = 45 m.

Q11. A ball is thrown vertically upward with a velocity of 30 m/s. The time taken to reach the maximum height is:

Using v = u - gt, at max height v=0, so t = u/g = 30/10 = 3 s.

Q12. A body is moving in a straight line with constant acceleration. The distance covered in the nth second is given by:

The distance covered in the nth second is given by the formula u + a/2(2n−1) for constant acceleration.

Q13. A body is moving with uniform velocity. Which of the following statements is true?

Uniform velocity means constant speed and direction, so acceleration, the rate of change of velocity, is zero.

Q14. The numerical ratio of displacement to distance is:

Displacement is the straight-line distance between start and end points, which can never exceed the total path length (distance), so the ratio is ≤ 1.

Q15. The motion of a parachutist descending with constant velocity is an example of:

Constant velocity implies zero net force, so the parachutist is in dynamic equilibrium despite motion.

Q16. A body is moving with a constant speed of 10 m/s. The distance covered in 5 seconds is:

Distance = speed × time = 10 m/s × 5 s = 50 m.

Q17. The equations of motion for freely falling bodies are derived by replacing "a" with:

In free fall, the acceleration due to gravity replaces 'a' in the equations of motion.

Q18. A car accelerates from 36 km/h to 72 km/h in 10 seconds. Its acceleration is:

Converting 36 km/h to 10 m/s and 72 km/h to 20 m/s, acceleration = (20 - 10)/10 = 1 m/s².

Q19. The distance covered by a freely falling body in the first second is:

Using s = (1/2)gt² with g = 10 m/s² and t = 1 s, the distance is 5 m, which matches the standard value for free fall in the first second.

Q20. A body is thrown vertically upward. The acceleration due to gravity acting on it is:

Gravity always acts downward toward the center of the Earth, regardless of the direction of motion of the body.

Q21. The acceleration of a body can be found from the slope of the:

Acceleration is the rate of change of velocity, so it is correctly determined from the slope of a velocity-time graph.

Q22. A body is moving with uniform acceleration. Its speed-time graph will be a:

Uniform acceleration means constant rate of change of velocity, resulting in a straight line with constant slope on a speed-time graph.

Q23. The speed of light is approximately:

The speed of light in vacuum is approximately 3 × 10^8 meters per second, a well-established physical constant.

Q24. The universal speed limit is the speed of:

The speed of light in vacuum is the universal speed limit according to Einstein's theory of relativity.

Q25. If the speed-time graph is a straight line parallel to the time axis, the body is moving with:

A horizontal speed-time graph indicates no change in speed, meaning constant speed and zero acceleration.

Q26. If the distance-time graph is a straight line parallel to the time axis, the body is:

A horizontal distance-time graph indicates no change in position over time, meaning the body is at rest.

Q27. The velocity of a body is given by the:

The slope of the distance-time graph gives speed, not velocity. Velocity is the slope of the displacement-time graph.

Q28. The motion of the blades of a fan is an example of:

Fan blades rotate about a fixed axis, which defines rotatory motion.

Q29. The motion of a butterfly is an example of:

A butterfly's motion is irregular and unpredictable, fitting the definition of random motion.

Q30. The motion of a car on a straight road is an example of:

Linear motion refers to movement along a straight path, which accurately describes a car traveling on a straight road.

Q31. A stone is dropped from a tower. The time taken to reach the ground depends on:

In free fall under gravity, time depends only on height and gravitational acceleration, assuming negligible air resistance. Mass, shape, and color do not affect the fall time.

Q32. A ball is thrown vertically upward. At the highest point, its velocity is:

At the highest point of vertical motion, the ball momentarily stops before reversing direction, so velocity is zero.

Q33. The value of acceleration due to gravity (g) near the Earth's surface is approximately:

The standard value of acceleration due to gravity near Earth's surface is approximately 9.8 m/s², commonly rounded to 10 m/s².

Q34. The equations of motion are valid for:

The standard equations of motion (s = ut + ½at², v = u + at, etc.) are derived under the assumption of constant (uniform) acceleration and do not apply when acceleration varies.

Q35. The acceleration of a body moving with uniform velocity is:

Uniform velocity implies no change in speed or direction, so acceleration, the rate of change of velocity, is zero.

Q36. If a body moves with constant speed in a circle, its velocity is:

In circular motion with constant speed, direction changes continuously, so velocity (a vector) is changing.

Q37. The shortest distance between the initial and final positions of a body is called:

Displacement is defined as the shortest straight-line distance between initial and final positions, with direction.

Q38. The motion of a freely falling body is an example of:

Freely falling bodies experience constant gravitational acceleration near Earth's surface, making it uniform acceleration.

Q39. The motion of a swing is an example of:

A swing moves back and forth about a fixed point, which is characteristic of vibratory (oscillatory) motion.

Q40. A body is said to be in motion if it:

Motion is defined as a change in position relative to a reference point over time.

Q41. The area under a speed-time graph represents:

The area under a speed-time graph gives the total distance traveled, as speed multiplied by time yields distance.

Q42. Negative acceleration is also known as:

Negative acceleration is synonymous with both deceleration and retardation, as both terms describe reduction in speed.

Q43. Acceleration is defined as the rate of change of:

Acceleration is a vector quantity defined as the rate of change of velocity with respect to time, incorporating both magnitude and direction.

Q44. The slope of a distance-time graph represents:

The slope of a distance-time graph gives speed, not velocity. Velocity requires direction and is derived from displacement-time graphs.

Q45. A car's speedometer measures:

A speedometer displays the speed of the vehicle at the exact moment it is read, which is the definition of instantaneous speed.

Q46. The rate of change of displacement is called:

Velocity is defined as the rate of change of displacement with respect to time.

Q47. If a body covers equal distances in equal intervals of time, it is moving with:

Uniform speed means equal distances covered in equal time intervals, regardless of direction change.

Q48. The SI unit of velocity is:

The SI unit of velocity is meter per second (m/s), as velocity is displacement per unit time in SI units.

Q49. A vector quantity is completely described by its:

Vector quantities require both magnitude and direction for complete specification, distinguishing them from scalars.

Q50. Which of the following is a scalar quantity?

Distance is a scalar quantity as it has magnitude only, without direction, unlike velocity, displacement, and acceleration which are vectors.

After Chapter 2: Kinematics, Practice Next Chapters

Once you finish these MCQs, continue with the next available chapters from Physics so your revision stays chapter-wise and complete.

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