Motion and Measurement of Distances: Class 6 Science Q&A
21 free answers on Motion and Measurement of Distances (Science) for Class 6 students, across CBSE, ICSE and State boards. Includes questions such as “Give two examples of periodic motion.”, “The distance between Radha’s home and her school is 3250 m. Express this distance in km.”, “The height of a person is 1.65 m. Express it into cm and mm.”
Question & Answer
Questions
- ScienceClass 6CBSE
Boojho was riding in his bicycle along a straight road. He classified the motion of various parts of the bicycle as (i) rectilinear motion (ii) circular motion and (iii) both rectilinear as well as circular motion. Can you list one part of the bicycle for each type of motion? Support your answer with reason.
Solution: Rectilinear motion: Handle of the bicycle has rectilinear It moves in a straight line as the wheels of bicycle move forward. Circular motion: Pedal of the bicycle is having circular motion it rotates with its shaft but does not move from its place. Rectilinear and circular motion: Wheel of the moving bicycle is having both circular and rectilinear motion. Wheels rotate on their shafts as well as move forward on the
- ScienceClass 6CBSE
Three students measured the length of a corridor and reported their measurements. The values of their measurements were different. What could be the reason for difference in their measurements? (Mention any three)
Some of the reasons for difference in their measurement could be Measurement may not be along the shortest length in all three The measuring devices may not be Different measuring devices were The end of the corridor may not be easily The smallest length that could be measured by different devices may be
- ScienceClass 6CBSE
How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.
The wheels of a moving bicycle indicate circular as well as rectilinear motion. Wheels of bicycle rotate on the ground which in turn moves the bicycle forward. A blade of a moving electric fan shows only circular motion as it is not moving from one place to another.
- ScienceClass 6CBSE
While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.
While sitting in a moving train, the trees appear to be moving in opposite direction because their position is changing with respect to us. While the position of co-passengers appears to be in stationary position since they are not changing with respect to us.
- ScienceClass 6CBSE
Match the events related to motion in column I with the types of motions given in column II. Column I Column II (a) A moving wheel of a sewing machine (i) Circular motion (b) Movement of tip of the minute hand of a clock in one hour (ii) Rotational motion (c) A moving swing (iii) Periodic motion
Solution: Here is the correct match: Column I Column II (a) A moving wheel of a sewing machine (ii) Rotational motion (b) Movement of tip of the minute hand of a clock in one hour (i) Circ
- ScienceClass 6CBSE
Four children measure the length of a table which was about 2m. Each of them used different ways to measure it. (i) Sam measured it with a half metre long thread. (ii) With a 15cm scale from her geometry box. (iii) Reena measured it using her hand span. (iv) Salim measured it using a 5m long measuring tape. Which one of them would get the most accurate length? Give reason for your
Solution: (iv) Salim measured it using a 5m long measuring tape. By using a 5m long measuring tape which is longer than the table, Salim would get the most accurate length. So, he can measure the length of the table in one go accurately.
- ScienceClass 6CBSE
Write one example for each of the following type of motion. (i) Rectilinear (ii) Circular (iii) Periodic Circular and periodic
Solution: Rectilinear - An apple falling vertically Circular - The motion of a point marked on the hands of a Periodic - Motion of a child on a Circular and periodic - Blades of a rotating
- ScienceClass 6CBSE
fill in the blanks. (i) Motion of an object or a part of it around a fixed point is known as motion. (ii) A body repeating its motion after certain interval of time is in motion. (iii) In rectilinear motion, object moves a line . SI unit of length is .
Solution: Circular periodic along; straight metre
- ScienceClass 6CBSE
Correct the following: (i) The motion of a swing is an example of rectilinear motion. 1m = 1000cm
Solution: No, the motion of a swing is not an example of rectilinear motion. The motion of a swing is an example of periodic motion as it repeats its motion after a fixed interval of 1m = 100 Each metre (m) is divided into 100 equal divisions, called centimeter (cm).
- ScienceClass 6CBSE
Which of the following does not express a time interval? (a) A day (b) A second (c) A school period Time of the first bell in the school
Solution: (d): Time of the first bell in the school Time of the first bell in the school represents a point of time, not a time interval.
- ScienceClass 6CBSE
The distance between Delhi and Mumbai is usually expressed in units of (a) decametre (b) metre (c) centimetre kilometre
Solution: (d): kilometre The distance between Delhi and Mumbai is usually expressed in units of kilometre.
- ScienceClass 6CBSE
Give two examples of periodic motion.
Solution: a) A needle of a sewing machine b) Pendulum
- ScienceClass 6CBSE
Why would you not like to use a measuring tape made of an elastic material like rubber to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with such a tape?
Solution: An elastic measuring-tape will not give accurate measurements as it stretches in length and reduces in size when stretched. When we express measurements taken with elastic tape, we have to tell whether the tape was stretched. If yes, how much? Hence, it is very difficult to tell the measurement taken from an elastic tape.
- ScienceClass 6CBSE
Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.
Solution: Similarities – The blades of a fan and the wheels of a bicycle show circular motion Differences – Bicycles move in rectilinear motion, but the fan does not move in rectilinear motion.
- ScienceClass 6CBSE
While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and at the other end is 33.1 cm. What is the length of the needle?
Solution: Length of needle = 33.1 – 3 = 30.1 cm
- ScienceClass 6CBSE
The distance between Radha’s home and her school is 3250 m. Express this distance in km.
Solution: 1km = 1000 m Hence, 3250 m = 3.25 kms
- ScienceClass 6CBSE
The height of a person is 1.65 m. Express it into cm and mm.
Solution: 1.65= 165 cm = 1650 mm
- ScienceClass 6CBSE
Arrange the following lengths in their increasing magnitude: 1 metre, 1 centimetre, 1 kilometre, 1 millimetre.
Solution: 1 millimetre, 1 centimetre, 1 metre, 1 kilometre
- ScienceClass 6CBSE
Why can a pace or a footstep not be used as a standard unit of length?
Solution: Pace or a footstep cannot be used as a standard unit of length because it varies from person to person.
- ScienceClass 6CBSE
Fill in the blanks: (i) One metre is ______________ cm. (ii) Five kilometre is ______________ m. (iii) Motion of a child on a swing is ______________. (iv) Motion of the needle of a sewing machine is ______________. (v) Motion of wheel of a bicycle is______________.
Solution: (i) One metre is 100 cm. (ii) Five kilometres is 5000 m. (iii) Motion of a child on a swing is periodic. (iv) Motion of the needle of a sewing machine is periodic. (v) Motion of the wheel of a bicycle is circular.