NCERT Class VI Science Solutions: Chapter 10 – Motion and Measurement of Distance Part 3

Download PDF of This Page (Size: 437K)

Question 9:

You are provided three scales A, B, and C as shown in fig. to measure a length of 10 cm.

Result for scale

Scale

Result for scale

For the correct measurement of the length you will use the scale.

  1. A only

  2. B only

  3. C only

  4. Any of the three scales

Answer: D

VERY SHORT ANSWER QUESTIONS

Question 10:

Correct the following.

  1. The motion of a swing is an example of rectilinear motion.

  2. 1 m = 1000 cm

Answer:

  1. The motion of a swing is an example of periodic motion.

    Or

    The motion of a swing is not an example of rectilinear motion.

    Periodic Motion

    Periodic Motion

    Periodic Motion

  2. 1 m = 100 cm

Question 11:

Fill in the blanks.

  1. Motion of an object or a part of it around a fixed point is known as _________ motion.

  2. A body repeating its motion after certain interval of time is in __________ motion.

  3. In rectilinear motion, object moves _________ a __________ line.

  4. SI unit of length is _________.

Answer:

  1. Motion of an object or a part of it around a fixed point is known as circular motion.

    Image result for circular motion

    Uniform Circular Motion

    Image result for circular motion

  2. A body repeating its motion after certain interval of time is in periodic motion.

  3. In rectilinear motion, object moves straight an along line.

  4. SI unit of length is metre.

Question 12:

Write one example for each of the following type of motion.

  1. Rectilinear

  2. Circular

  3. Periodic

  4. Circular and periodic

Answer:

  1. An object moving on a straight road, falling stone, etc.

  2. A mark on blades of a rotating fan, tips of the hands of a clock, etc.

  3. Motion of a child on a swing, motion of pendulum, strings of a guitar, etc.

  4. Blades of a rotating fan, hands of a clock, etc.