Measurement of Length and Motion Class 6 Long Question Answer

Measurement of Length and Motion Class 6 Long Question Answer

Measurement of Length and Motion Class 6 Long Question Answer

Question 1.

Four children measure the length of a table which was about 2 m. Each of them used different ways to measure it.

(i) Sam measured it with a half metre long thread.

(ii) Gurmeet measured it with a 15 cm scale from her geometry box.

(iii) Reena measured it using her hand span.

(iv) Salim measured it using a 5 m long measuring tape.

Which one of them would get the most accurate length? Give reason for your answer.

Answer:

Salim would get the most accurate length. The reason is that in this case the length of the table can be measured in one go because the measuring tape is longer than the table. In the other cases the chance of making an error is higher due to multiple measurement. In case of Sam, he can measure the lengths which are exact multiples of half a metre.

Question 2.

What care we need to take while taking measurement of a length ?

Answer:

We need to take following care :

(1) Place the scale in contact with the object along its length.

Fig. Method of placing the scale along the length to be measured (a) correct and (b) incorrect

(2) In some scales, the ends may be broken. In such cases, measurements should not be taken from the zero mark of the scale.

(3) Correct position of the eye is also important for taking measurement. The eye must be exactly in front of the point where the measurement is to be taken.