Q1Multiple choice
The distance between Delhi and Mumbai is usually expressed in units of
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Correct option: D
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Ans: The correct answer is (d) kilometer.
NCERT Exemplar · Class 6 · Science
Chapter 10: Motion and Measurement of Distances
Practice each question, then open the answer or worked solution.
Multiple Choice Questions
9 questionsQ2Multiple choice
Which of the following does not express a time interval?
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Correct option: D
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Ans: The correct answer is (d) Time of the first bell in the school.
Explanation: Time of the first bell signify a point of time, not a time interval.
Q3Multiple choice
Fig. $10.1$ shows a measuring scale which is usually supplied with a geometry box. Which of the following distance cannot be measured with this scale by using it only once?
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Correct option: C
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Ans: The correct answer is (c) $0.2m$
Explanation: $0.2m$ cannot be measured by using given scale only once because measuring scale is only $0.15m$ long.
Q4Multiple choice
A piece of ribbon folded five times is placed along a $30cm$ long measuring scale as shown in Fig. $10.2$.
The length of the ribbon is between
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Correct option: B
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Worked solution
Ans: The correct answer is (b) $1.25m - 1.35m$.
Explanation: The length of five times folded ribbon = $\left( {27.5 - 2} \right)cm \times 5$
$ = 1.275m$
Which lies between $1.25m - 1.35m$.
Q5Multiple choice
Paheli moves on a straight road from point A to point C. She takes $20$ minutes to cover a certain distance AB and $30$ minutes to cover the rest of distance BC. She then turns back and takes $30$ minutes to cover the distance CB and $20$ minutes to cover the rest of the distance to her starting point. She makes $5$ rounds on the road the same way. Paheli concludes that her motion is
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Correct option: C
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Ans: The correct answer is (c) rectilinear and periodic both.
Explanation: Paheli is moving along a straight line, so her motion is rectilinear and she is also moving with a fixed time period, so her motion is periodic. Therefore, the correct answer is both rectilinear and periodic.
Q6Multiple choice
Bholu and Golu are playing in a ground. They start running from the same point A in the ground and reach point B at the same time by following the paths marked $1$ and $2$ respectively as shown in Fig. $10.3$. Which of the following is/are true for the given situation.
As compared to Golu, Bholu covers a
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Correct option: B
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Ans: The correct answer is (b) longer distance with a high speed.
Explanation: We can see in the given figure that path $1$ is longer than $2$, but both have reached point B at the same time. So, Bholu walked faster than Golu.
Q7Multiple choice
Four pieces of wooden sticks A, B, C and D are placed along the length of $30cm$ long scale as shown in Fig. $10.4$. Which one of them is $3.4cm$ in length?
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Correct option: C
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Ans: The correct answer is option (c) C.
Explanation: Length of a wooden stick = Final reading of scale – Initial reading of scale.
Name of wooden stick | Length of a wooden stick = Final reading of scale – Initial reading of scale. |
A | $2.7 - 0.3 = 2.4cm$ |
B | $6.5 - 3.4 = 3.1cm$ |
C | $10.4 - 7 = 3.4cm$ |
D | $14.4 - 10.7 = 3.7cm$ |
Q8Written answer
Which of the following figure shows the correct placement of a block along a scale for measuring its length?
a)
b)
c)
d)
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Ans: The correct answer is (c).
Explanation: Object should be placed on a scale in such a way that its vertices lie in between the readings marked on the scale.
Q9Multiple choice
You are provided three scales A, B and C as shown in Fig. $10.6$ to measure a length of $10cm$.
For the correct measurement of the length you will use the scale
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Correct option: D
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Worked solution
Ans: The correct answer is (d) any of the three scales.
Explanation: Length of $10cm$ is available in all the scales.