Speed and Acceleration Quiz - CBSE Class 6 Science

Free practice quiz: Speed and Acceleration (CBSE Class 6 Science). 17 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. What is speed?

   1. Distance traveled per unit time
   2. The maximum distance covered
   3. The time taken to travel a distance
   4. The sum of distances traveled
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   Answer: A. Distance traveled per unit time

   Speed is defined as the distance traveled in a unit of time. It measures how fast an object moves.

2. If a car's speed increases from 20 m/s to 40 m/s in 5 seconds, what is its average acceleration?

   1. 4 m/s²
   2. 5 m/s²
   3. 2 m/s²
   4. 6 m/s²
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   Answer: A. 4 m/s²

   Acceleration is calculated by the change in speed divided by the time taken. (40 m/s - 20 m/s) / 5 s = 4 m/s².

3. Which of the following is not a unit of acceleration?

   1. m/s²
   2. km/h²
   3. m/s
   4. ft/s²
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   Answer: C. m/s

   Acceleration is measured in units of speed per time, so m/s is not a unit of acceleration.

4. What happens to the speed if the acceleration is zero?

   1. Speed increases
   2. Speed decreases
   3. Speed remains constant
   4. Speed cannot be determined
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   Answer: C. Speed remains constant

   If acceleration is zero, this means there is no change in speed, thus it remains constant.

5. If a ball rolls down a hill and its speed increases from 0 m/s to 15 m/s in 3 seconds, what is its average acceleration?

   1. 5 m/s²
   2. 10 m/s²
   3. 8 m/s²
   4. 4 m/s²
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   Answer: A. 5 m/s²

   Average acceleration = (Final Speed - Initial Speed) / Time = (15 m/s - 0 m/s) / 3 s = 5 m/s².

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