Motion and Measurement Test

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Motion and Measurement Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and on the other end is 33.1 cm. What is the length of the needle?

A
33.1 cm

B
30.1 cm

C
36.1 cm

D
27.1 cm

Solution

The length of the needle = 33.1 - 3.0 = 30.1 cm
Question 2
1 / -0

Directions: Choose the correct statement(s).

a. The length of the scale that is used to measure an object must be greater than the length of the object.
b. The eye should be placed just above the points that you are reading, otherwise there will be error due to parallax.
c. If the zero mark of a scale is damaged or edge of the scale is not smooth, then start measuring from another mark.

A
Only (a)

B
Only (a) and (b)

C
Only (b) and (c)

D
All of these

Solution

a. The length of the scale that is used to measure an object can be less than the length of the object. All the readings can be added to get the total length.
b. The eye should be placed just above the points that you are reading, otherwise there will be error due to parallax.
c. If the zero mark of a scale is damaged or edge of the scale is not smooth, then start measuring from another mark.
Question 3
1 / -0

Which of the following options is an example of a rectilinear motion?

A
Moon revolving around the Earth

B
Falling of a stone

C
Motion of a child on a swing

D
Vibrating strings of a guitar

Solution

^{_{Moon revolving around the Earth -}_{Circular motion and Periodic motion
Falling of a stone -}_{Rectilinear motion
Motion of a child on a swing -}_{Periodic motion
Vibrating strings of a guitar -}_{Periodic motion}}

Question 4

1 / -0

Directions: Match the items given in Column A with those given in Column B.

Column A	Column B
(A) Metre	(P) Unit used to measure very small distances
(B) Millimetre	(Q) Unit used to measure large distances
(C) Hand span	(R) SI unit of length
(D) Kilometre	(S) Non-standard unit of length

A - P, B - Q, C - R, D - S

A - R, B - P, C - S, D - Q

A - P, B - R, C - Q, D - S

A - S, B - Q, C - P, D - R

Solution

(A) Metre - SI unit of length (Used to measure distance)
(B) Millimetre - Unit used to measure very small distances (1 m = 1000 mm)
(C) Hand span - Non-standard unit of length (As every hand is not equal, it is not standard.)
(D) Kilometre - Unit used to measure large distances (1 km = 1000 m; hence, it is a big quantity and used to measure big distances like distance between two cities.)

Question 5
1 / -0

1 cm on a scale is divided into 20 equal divisions. The minimum length that can be measured using the scale is

A
0.5 cm

B
0.5 mm

C
2 mm

D
1 mm

Solution

1 cm on a scale is divided into 20 equal divisions.
So, 1 division =
= 0.05 cm and we have 1 cm = 10 mm
Hence, 0.05 cm = 0.05 x 10 = 0.5 mm
Question 6
1 / -0

A piece of thread, folded five times, is placed along the 15 cm long scale with one end lying at 1 cm mark and the other end lying at 14.3 cm mark. Then, the length of the thread is

A
133 mm

B
66.5 mm

C
665 mm

D
532 mm

Solution

Length of one part of the thread = 14.3 - 1.0 = 13.3 cm
So, the total length of the thread = 5 x 13.3 = 66.5 cm
1 cm = 10 mm
Hence, total length of the thread = 665 mm
Question 7
1 / -0

Directions: Two statements are given below. Read both the statements carefully and choose the correct alternative.

Statement A: Motion of the second hand of a clock is rectilinear.
Statement B: In rectilinear motion, each particle of the body moves in the same direction and with the same speed.

A
Only statement A is correct.

B
Only statement B is correct.

C
Both statements A and B are incorrect.

D
Both statements A and B are correct.

Solution

In rectilinear motion, each particle of the body moves in the same direction and with the same speed. So, statement B is correct.
Motion of the second hand of a clock is an example of the rotational motion. So, statement A is incorrect.
Question 8
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Which of the following is the example(s) of periodic motion?

A
To and fro motion of an object about mean position.

B
The motion of an object moving along a circular path about a fixed point.

C
A motion repeating itself after regular intervals of time.

D
All of the above

Solution

Periodic motion is the motion which repeats itself after fixed interval of time. To and fro motion of the particle is oscillatory motion which also repeats itself after fixed time interval. Circular motion is a motion which repeats itself after fixed time interval. Hence, all of the above are examples of periodic motion.
Question 9
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Directions: Choose the correct statement(s).

(a) Beating of our heart is a non-periodic motion.
(b) The points on the rim of a rotating wheel move in a circular path.
(c) Motion of the seconds hand of a clock is rectilinear.

A
Only (a)

B
Only (b)

C
Only (c)

D
Only (a) and (c)

Solution

Beating of heart is a periodic motion as it repeats itself after fixed time intervals. Motion of the seconds hand of a clock is an example of the rotational motion. The points on the rim of a rotating wheel move in a circular path, hence only statement (b) is correct.
Question 10
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Motion of the strings on a veena is

(a) vibratory
(b) periodic
(c) rotatory

A
Only (a) and (c)

B
Only (a) and (b)

C
Only (b) and (c)

D
All of these

Solution

In veena, strings move up and down between the two fixed points. Hence, we can say that motion of the string is vibratory and periodic.

Question 11

1 / -0

Match the following.

Column I	Column II
(1) Hands of the clock	(A) periodic motion
(2) Train moving on a track	(B) rotational motion
(3) Rocking chair	(C) circular motion
(4) Wheel of a cycle	(D) linear motion

1 - D, 2 - B, 3 - C, 4 - A

1 - A, 2 - D, 3 - C, 4 - B

1 - C, 2 - D, 3 - A, 4 - B

1 - C, 2 - A, 3 - D, 4 - B

1 - B, 2 - D, 3 - A, 4 - C

Solution

Hands of clock move in circular motion. ( because its bath is round)
Train moves in linear motion.(because it moves in straight line)
Rocking chair moves in periodic motion. (because it repeats its motion)
Wheel of a cycle moves in rotational motion. (because it rotates in a circular path)

Question 12
1 / -0

Which of the following can be measured on the given measuring scale?

A
0.21 m

B
0.10 m

C
0.25 m

D
0.28 m

Solution

We can measure 15 cm with the help of the given scale so the quantity which can be measured by this scale should be less than 10 cm.
Hence we can measure 10 cm or 0.10 m
Question 13
1 / -0

Four pieces of wooden sticks A, B, C and D are placed along the length of a 15 cm long scale, as shown in the figure. Which one of them is 2.3 cm in length?

A
A

B
B

C
C

D
D

Solution

Length of stick A is 2.8 cm - 0.5 cm = 2.3 cm
Question 14
1 / -0

Sonam moves on a straight road from point X to point Z. She takes 20 minutes to cover a certain distance XY and 30 minutes to cover rest of the distance YZ. She then turns back and takes 30 minutes to cover the distance ZY and 20 minutes to cover rest of the distance to her starting point. She makes 5 rounds on the road the same way. Paheli concludes that Sonam's motion is

A
only rectilinear

B
only periodic

C
both rectilinear and periodic

D
neither rectilinear nor periodic

Solution

As Sonam moves from point X to point Z and back from point Z to point X in a straight line; so we can say her motion is a rectilinear motion. She repeats the trip five times; so it is an example of periodic motion. Hence, her motion is both rectilinear and periodic.
Question 15
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Which of the following does not possess a rotational motion?

A
Elevator

B
Potter's wheel

C
Turning of merry-go-round

D
Spinning of tub in a washing machine

Solution

Rotation of wheel, movement of merry-go-round, spinning of tub in a washing machine are all the examples of rotational motion as all bodies are moving around a fixed central axis through themselves except the motion of an elevator, which is a type of translatory motion.
Question 16
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Three students A, B and C took measurement from different positions, as shown in the figure. The most accurate measurement will be taken by

A
student A

B
student B

C
student C

D
students A and C

Solution

Correct position of eye is very important for taking measurement. The eye must be exactly infront of the point where the measurement is to be taken. Thus, position of student 'B' as shown in the figure, is the correct position of the eye.
Question 17
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The height of a boy is 163 cm. What is his height in metres?

A
0.163 m

B
16300 m

C
1.63 m

D
163 m

Solution

1 m = 100 cm
163 cm = = 1.63 m
Question 18
1 / -0

To measure the length of a curved line, you will use

A
a thread

B
a geometry scale

C
a divider

D
Both (1) and (3)

Solution

We can use a thread to measure curved line. First, take a thread and put it on the curved line such that it coincides with the curved line and now measure the length of the thread using a scale.
Question 19
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Rahul was measuring the length of his pencil box with his broken scale. He put a 1.5 cm mark on the scale at one end and noted down the reading at the other end, which came out to be 14.9 cm. The length of his pencil box was

A
14.9 cm

B
13.9 cm

C
13.4 cm

D
12.4 cm

Solution

Length of the pencil box = 14.9 - 1.5 = 13.4 cm
Question 20
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A pendulum swings backward and forward passing through the point Y. The first time the pendulum passes through Y, a stopwatch is started. The stopwatch is stopped when it passes through Y the second time, with reading T. The time period of the oscillation is

A
T

B
2T

C
3T

D
4T

Solution

Consider the following diagram.

Time taken to complete half oscillation is T. So, total time taken to complete one oscillation is 2T.

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Motion and Measurement Test - 4

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Motion and Measurement Test - 4

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Question 1

33.1 cm

30.1 cm

36.1 cm

27.1 cm

Solution

Question 2

Only (a)

Only (a) and (b)

Only (b) and (c)

All of these

Solution

Question 3

Moon revolving around the Earth

Falling of a stone

Motion of a child on a swing

Vibrating strings of a guitar

Solution

Question 4

A - P, B - Q, C - R, D - S

A - R, B - P, C - S, D - Q

A - P, B - R, C - Q, D - S

A - S, B - Q, C - P, D - R

Solution

Question 5

0.5 cm

0.5 mm

2 mm

1 mm

Solution

Question 6

133 mm

66.5 mm

665 mm

532 mm

Solution

Question 7

Only statement A is correct.

Only statement B is correct.

Both statements A and B are incorrect.

Both statements A and B are correct.

Solution

Question 8

To and fro motion of an object about mean position.

The motion of an object moving along a circular path about a fixed point.

A motion repeating itself after regular intervals of time.

All of the above

Solution

Question 9

Only (a)

Only (b)

Only (c)

Only (a) and (c)

Solution

Question 10

Only (a) and (c)

Only (a) and (b)

Only (b) and (c)

All of these

Solution

Question 11

1 - D, 2 - B, 3 - C, 4 - A

1 - A, 2 - D, 3 - C, 4 - B

1 - C, 2 - D, 3 - A, 4 - B

1 - C, 2 - A, 3 - D, 4 - B

1 - B, 2 - D, 3 - A, 4 - C

Solution

Question 12

0.21 m

0.10 m

0.25 m

0.28 m