Download Crossword for Acceleration

Answers for Word Games in Mechanics
Writing Skill Practice for ‘Different types of forces’
I. Rearrange the following sentences into a logical order.
II. Write out the paragraph obtained.
5. There are two Classes of forces.
7. One class is called contact forces.
2. They arise from the physical contact of two bodies.
3. The force used to pull a spring or push a cart is an example of
contact forces.
8. Frictional force and force produced by air pressure belongs also
to this class.
4. Another class of forces is known as action-at-a-distance forces.
6. These forces do not involve physical contact between interacting
bodies.
1. Gravitational force, magnetic force and electric force belong to
the second class.
Wordsearch puzzle for The law of inertia
A
B
C
D
E
F
G
H
1
M
U
N
I
F
O
R
M
2
O
N
O
N
Z
E
R
O
3
T
L
T
E
B
O
D
Y
4
I
E
C
R
O
F
S
W
5
O
S
E
T
A
T
S
I
6
N
S
T
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C
W
A
L
7
T
N
I
A
M
E
R
L
Horizontal
A1 MOTION
A4 IT
A5 ON
B1 UNLESS
C1 NOT
D1 IN
D1 INERTIA
D7 A
H4 WILL
Vertical
1B UNIFORM
1D IF
1F OF
2B NONZERO
3E BODY
4F FORCE
5G STATE
5G STATES
6D ITS
6h LAW
Slant
D4↗ REST
D7↙ ACTS
Statement about the Law of Inertia is not unique.
The law of inertia states (that) a body will remain in its state of rest or uniform motion unless a
nonzero (net) force acts on it.
OR
The law of inertia states (that) a body will not remain in its state of rest or uniform motion if a
nonzero (net) force acts on it.
* Words in blankets are not found in the letter grid. Depending on the ability of students, the word
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‘inertia’ may be removed from the puzzle at the start. Students are asked to find the magic word,
which emerges when other words are found.
Answer for Crossword in Acceleration
ａ
ｂ
ｃ
ｄ
ｅ
１ ２ ３ ４ ５ ６ ７ ８ ９ 10 11 12
Ｒ Ｅ Ｔ Ａ Ｒ Ｄ Ａ Ｔ Ｉ Ｏ Ｎ
Ｅ
Ｔ
Ｅ
Ｓ
Ｓ Ｃ Ａ Ｌ Ａ Ｒ
Ｍ
Ｔ Ａ Ｐ Ｅ
Ｅ
Ａ
Ｌ
Ｒ
Ｄ
Ｇ
ｆ Ａ Ｃ Ｃ Ｅ Ｌ Ｅ Ｒ Ａ Ｔ Ｉ Ｏ Ｎ
ｇ
Ｒ
Ｔ
Ｒ
Ｉ
ｈ Ｄ Ｉ Ｓ Ｐ Ｌ Ａ Ｃ Ｅ Ｍ Ｅ Ｎ Ｔ
ｉ
Ｔ
Ｃ
Ｕ
ｊ Ｖ Ｅ Ｌ Ｏ Ｃ Ｉ Ｔ Ｙ
Ｔ
Ｄ
ｋ
Ｏ
Ｔ Ｉ Ｍ Ｅ
ｌ
Ｓ Ｅ Ｃ Ｏ Ｎ Ｄ
Ｏ
ｍ
Ｍ
Ｕ Ｎ Ｉ Ｔ
SOLUTION to CROSSWORD PUZZLE in MECHANICS
1
A
B
C
D
E
F
G
H
I
J
L
M
N
O
P
S
T
R
E
A
M
S
O
N
A
R
2
T
E
E
K
E
E
E
3
O
A
N
T
I
C
L
O
C
K
W
I
S
E
4
R
E
H
5
Q
W
P
A
O
N
T
O
U
L
B
6
U
N
B
A
L
A
N
C
E
D
N
E
T
7
E
B
I
8
9
10
K
I
N
E
L
A
S
T
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C
N
P
P
L
C
Q
U
M
S
O
U
N
D
A
2
I
11
V
E
C
T
O
R
L
S
I
12
T
I
T
V
14
15
C
P
E
F
M
P
O
W
E
R
13
W
I
N
D
B
S
N
R
E
A
R
T
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M
E
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R
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G
16
G
E
O
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H
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A
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Y
M
Across
A2
B8
C15
D1 &
D11
E15
F5
F9
G1
G12
I2
I6
J1
L7
M1
M8
N13
O1
O11
P10
Down
1B
1J
2I
3C
Torque is the product of force and moment arm.
A moving object has kinetic energy.
The abbreviation PE is often used to denote potential energy.
Wind and tide are renewable energy sources.
The abbreviation of the British unit of length is ft.
The abbreviation of the unit of pressure is Pa.
If there is no air resistance, a coin and a feather will fall at the same rate.
Mechanics is the part of physics that deals with force, motion and energy.
The SI unit of distance is metre (in UK spelling).
The abbreviation of knockout is KO in a boxing game.
A body is in equilibrium if it is at rest or in uniform motion.
The SI unit of time is second.
The abbreviation of millisecond is ms.
The SI unit of force is newton.
Newton’s third law states that to every action, there is an equal but opposite reaction.
The abbreviation of mechanical advantage is MA.
Two or more forces can be combined and represented by a single resultant force.
Energy is the ability to do work.
The abbreviation of velocity ratio is VR.
Fish has streamlined bodies to reduce friction in swimming.
A sonar uses sound waves for underwater ranging and detection.
The abbreviation of kinetic energy is KE.
The condition of equilibrium for rotational motion is that the sum of clockwise moments
about any point is equal to the sum of anticlockwise moments about that point.
5F
Same as F5.
5O
The abbreviation of the British unit of mass is lb.
6A & Newton’s first law states that a body remains in its state of rest or uniform motion unless
6M
it is acted on by an unbalanced force, or a nonzero net force.
8L & In inelastic collision, some kinetic energy is converted to heat and sound.
9B
11A A vector quantity has magnitude and direction.
11H The SI unit of length, mass and time are meter, kilogram and second respectively.
11L
Power is the rate of work done.
13A Windmills can be used to generate electricity.
13F
Passenger cars have collapsible front and rear sections to reduce the force of impact in a
collision.
13L
A timer is a device used to measure time.
14I
The abbreviation of the British subunit of length is in.
14M Tar is a fluid with a very high viscosity.
16B Geothermal energy comes from the heat under the crust of the Earth.
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Answer: Coordinate and orientation of words:
A
B
C
D
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F
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M
N
O
P
1
M
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M
C
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I
N
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2
A
O
T
E
X
X
E
A
L
E
P
E
R
E
N
3
X
U
A
N
T
I
C
L
O
C
K
W
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S
E
4
I
N
W
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R
S
H
M
M
O
N
T
T
U
M
5
M
D
I
W
A
U
A
I
T
N
I
O
P
L
O
6
U
N
B
A
L
A
N
C
E
D
S
N
E
T
M
7
M
S
D
B
R
U
I
R
Q
S
L
L
O
A
D
8
I
K
O
L
T
T
C
O
U
A
C
O
I
N
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9
N
I
N
E
L
A
S
T
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C
Y
P
S
T
A
4
10
I
N
E
R
T
I
A
T
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T
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P
S
T
G
11
V
E
C
T
O
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N
S
I
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P
O
W
E
R
12
H
T
A
P
A
E
P
V
B
G
R
S
U
N
A
13
W
I
N
D
T
H
A
A
R
B
T
I
M
E
M
14
O
C
I
O
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R
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A
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N
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T
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L
15
R
I
P
R
G
S
P
T
U
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N
E
R
G
Y
16
K
G
E
O
T
H
E
R
M
A
L
E
V
E
R
Across:
A1
A7
A13
B1
B7
B8
C4
C7
C8
C11
D1
E1
F1
F9
G1
H1
H4
I6
J1
L6
L13
M1
M8
M12
N10
O1
P6
P7
P10
Vertical
MAXIMUM
1B STREAM
MINI
1H COSINE
WORK
1J SINE
SOUND
1L INERT
SKIN
2L PER
KINETIC
2N REPEL
WATT
3C ANTICLOCKWISE
DONE
3G CLOCK/CLOCKWISE
ONE
4F SHM
CAN
5N POINT
RENEWABLE 6A UNBALANCED
EXTRA
6C BALANCE
AXIS
6E LANCE
AIR
6M NET
MECHANICS
6O TEN
CALM
7M LOAD
MICRO
7L COIN
EQUILIBRIUM 9B INELASTIC
SECOND
9D ELASTIC
SINK
10A INERTIA
TIN
11A VECTOR
NEWTON
11D TORN
OPPOSITE
11J POWER
SIT/SITE
12D PATH
SWUM
12M SUN
RESULTANT
13A WIND
MOMENT
13L TIME
DIAGRAM
14I INITIAL
GRAM
15J ENERGY
16B GEOTHERMAL
16J LEVER
Slant:
C15↙ POTENTIAL
E4↘ RUN
E7↖ RAIN
E13↗ TOP
E15↙ GRAVITY
F11↗ RADII
F15↙ STABLE
G4↖ THAT
G9↖ STRAIN
G11↖ NIL
H6↖ CAST
H11↗ SPHERE
I4↗ MINUTE
J12↗ GRAPH
L6↘ SLIT
L7↘ LOST
N4↗ TOSS
N10↘ SEA
Sample sentences:
1. Geothermal energy, energy from the sun and from wind are renewable energy sources.
2. Kinetic energy is conserved in an elastic collision.
3. Energy is ability to do work
4. A point mass is in equilibrium if the resultant of all forces, or the net force, acting on the mass is
zero.
5. The condition of equilibrium for parallel forces is the sum of clockwise moment equals to the sum
of anticlockwise moment.
6. In one dimension, work is force times distance.
7. Kinetic energy is often converted into heat and sound in an inelastic collision.
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8. Power is the rate of work done.
9. The unit of power is Watt, which is the same as Joule per second.
10. A free body diagram is used to find the unbalanced force, if any, acting on a single body.
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