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CBSE Class 9 Motion — practice questions

Explore 51 free Motion questions in CBSE Class 9 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Motion questions and exercises with answers

Showing questions 1–30 of 51.

Motion in a straight line is also called:Read the answer and worked solution →The shortest straight-line distance from the starting point to the final position is called:Read the answer and worked solution →The SI unit of speed is:Read the answer and worked solution →A car travels 50 km north and then 30 km south. The DISPLACEMENT is:Read the answer and worked solution →A car uniformly accelerates from rest to 20 m/s in 10 seconds. Its acceleration is:Read the answer and worked solution →A car decelerates uniformly from 30 m/s to 0 in 6 seconds. Its acceleration is:Read the answer and worked solution →For an object moving in a straight line with positive velocity and positive acceleration, the object is:Read the answer and worked solution →A bus starts from rest and accelerates at 2 m/s² for 10 s. The distance it travels in this time is:Read the answer and worked solution →The slope of a DISTANCE-TIME graph represents the:Read the answer and worked solution →On a velocity-time graph, the slope represents the:Read the answer and worked solution →The first equation of motion is:Read the answer and worked solution →A bus travelling at 10 m/s accelerates uniformly at 2 m/s² for 5 seconds. Its final velocity is:Read the answer and worked solution →A car starts from rest and reaches 30 m/s in 6 seconds. The distance covered in this time is:Read the answer and worked solution →A ball is thrown vertically upward at 20 m/s (take g = 10 m/s²). The TIME to reach the highest point is:Read the answer and worked solution →Using v² = u² + 2as, find the distance a car needs to stop from 20 m/s if its deceleration is 4 m/s²:Read the answer and worked solution →A car covers the first half of its journey at 60 km/h and the second half at 40 km/h. The AVERAGE speed for the whole journey is:Read the answer and worked solution →At what time, t, will an object thrown vertically upward at 30 m/s reach its maximum height? (Take g = 10 m/s²)Read the answer and worked solution →An object's velocity-time graph is a straight HORIZONTAL line at v = 5 m/s for 10 seconds. The distance travelled is:Read the answer and worked solution →A cab covers 60 km in 1.5 hours. Its AVERAGE SPEED is:Read the answer and worked solution →A car accelerates from 10 m/s to 20 m/s in 5 seconds. Its acceleration is:Read the answer and worked solution →A train starts from rest (u = 0) and accelerates uniformly at a = 2 m/s² for t = 10 s. The distance it covers is:Read the answer and worked solution →For a round trip from home to school and back, displacement equals:Read the answer and worked solution →Acceleration is defined as:Read the answer and worked solution →CLASS9 · Physics · Speed, Velocity, AccelerationRead the answer and worked solution →Match the motion quantity to its unitRead the answer and worked solution →The shortest distance from the initial to the final position is:Read the answer and worked solution →If an object returns to its starting point, its displacement is:Read the answer and worked solution →Covering equal distances in equal intervals of time is called:Read the answer and worked solution →A car moving on a crowded street is an example of:Read the answer and worked solution →The distance travelled by an object in unit time is its:Read the answer and worked solution →

Worked practice questions

Motion in a straight line is also called:

  1. Linear motion
  2. Random motion
  3. Rotational motion
  4. Circular motion
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Correct answer: A. Linear motion

Linear motion = motion along a straight line. **Examples:** a car on a straight highway, a vertically falling ball, a train on a straight track. It's the simplest kind of motion to analyse.

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The shortest straight-line distance from the starting point to the final position is called:

  1. Displacement
  2. Path length
  3. Speed
  4. Distance
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Correct answer: A. Displacement

Displacement is the straight-line vector from the start to the end position (with direction). Distance is the total path length travelled (always ≥ |displacement|). Both have SI unit metre.

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The SI unit of speed is:

  1. m/s
  2. m·s
  3. km/h
  4. s/m
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Correct answer: A. m/s

Speed = distance / time, so SI unit is metre per second (m/s or m·s⁻¹). km/h is also common but not SI.

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