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Physics
WAEC / WASSCE 2014
Current Electricity & Electric Circuits
When an elastic material is stretched by a force, the energy stored in it is
A
kinetic
B
potential
C
thermal
D
electrical
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #35739)
Physics
WAEC / WASSCE 2014
Newton's Laws, Momentum & Collisions
When the linear momentum of a body is constant, the net force acting on it
A
is zero
B
increases
C
decreases
D
remains constant
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35740)
Physics
WAEC / WASSCE 2014
Current Electricity & Electric Circuits
If no net force acts on an object, the object maintains a state of rest or constant speed in a straight line. The above is a statement of Newton's
A
first law of motion
B
second law of motion
C
third law of motion
D
law of universal gravitation
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35741)
Physics
WAEC / WASSCE 2014
Current Electricity & Electric Circuits
Which of the following pairs of physical quantities is made up of vectors?
A
speed and displacement
B
mass and force
C
dislacement and acceleration
D
momentum and length
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #35742)
Physics
WAEC / WASSCE 2014
Elasticity, Density, Pressure & Fluids
The knowledge of surface tension is applied in the following areas except in
A
manufacturing of rain coats
B
production of palm oil
C
floating of a needle on water
D
washing of plates with soapy water
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #35743)
Physics
WAEC / WASSCE 2014
Current Electricity & Electric Circuits
Solution
A body is projected vertically upwards with a speed of 10 ms-1 from a point 2m above the ground. Calculate the total time taken for the body to reach the ground. [g = 10ms-2]
A
1.00s
B
2.00s
C
2.18s
D
3.00s
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
T = \(\frac{2u}{g} = \frac{2 \times 10}{10} = 2s\)
Source: Myschool Past Questions Archive (Record #35744)
Physics
WAEC / WASSCE 2014
Linear Motion, Projectiles & Kinematics
Solution
A car starts from rest and covers a distance of 40m in 10s. Calculate the magnitude of its acceleration
A
0.25ms-2
B
0.80ms-2
C
3.20ms-2
D
4.00ms-2
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
S = ut + \(\frac{1}{2} at^2\)
40 = 0 x 10 + \(\frac{1}{2}\) x a x 102
50a = 40
a = \(\frac{40}{50}\)
= 0.8ms-2
Source: Myschool Past Questions Archive (Record #35745)
Physics
WAEC / WASSCE 2014
Work, Energy, Power & Simple Machines
A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression
A
\(\frac{2 \pi r^2}{P}\)
B
\(\frac{2 \pi r}{P}\)
C
\(\frac{2 \pi}{rp}\)
D
\(\frac{P}{2 \pi r}\)
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #35751)
Physics
WAEC / WASSCE 2014
Gas Laws & Heat Transfer
Solution
Heat transfer by conduction is similar to wave motion because
A
there is increase in temperature
B
transfer of materials is involved
C
charged particles vibrates at right angles
D
no transfer of materials is involved
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Heat transfer by conduction is similar to wave motion because no transfer of materials is involved. In conduction, heat is transferred from molecule to molecule within a substance without moving the substance as a whole. This is similar to wave motion where energy is transferred from particle to particle within the medium without any net movement of the medium itself.
Source: Myschool Past Questions Archive (Record #35752)
Physics
WAEC / WASSCE 2014
Calorimetry, Latent Heat & Change of State
The temperature at which the water vapor in the air saturates the air and begins to condense is known as
A
dew point
B
critical point
C
boiling point
D
triple point
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35753)
Physics
WAEC / WASSCE 2014
Calorimetry, Latent Heat & Change of State
The change of state from solid to liquid occurs
A
at constant temperature
B
when temperature is lower than the boiling point
C
when temperature is just near freezing point
D
when temperature is equal to the boiling point
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35754)
Physics
WAEC / WASSCE 2014
Temperature, Thermometry & Thermal Expansion
Which of the following types of thermometers can be used to measure a range of temperature from -50^\circC to 50^\circ? i. Clinical ii. Mercury iii. Alcohol-in-glass
A
i only
B
ii only
C
iii only
D
i and ii only
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #35755)
Physics
WAEC / WASSCE 2014
Equilibrium of Forces, Moments & Flotation
Diagram
Solution
The diagram above illustrates a uniform metre rule which is balanced on a pivot by some masses. Calculate the value of M
Attached Figure / Diagram
A
500.0g
B
400.0g
C
44.4g
D
25.0g
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
clockwise moment = Anti-clock wise moment
= M x 40 = 100 x 10
M = \(\frac{1000}{40}\)
= 25g
Source: Myschool Past Questions Archive (Record #35746)
Physics
WAEC / WASSCE 2014
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
The period of a simple pendulum X is 5s. What is the period of a simple pendulum Y which makes 50 vibrations in the same time it takes X to make 20 vibrations?
A
12.5s
B
2.5s
C
2.0s
D
1.2s
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
It takes X 5s for 1 complete vibration.
⇒ It takes X (5 x 20)s for 20 vibrations.
= 100s.
It takes Y 100s for 50 vibrations.
⇒ The period of Y = \(\frac{100}{50}\)s
= 2s.
Source: Myschool Past Questions Archive (Record #35747)
Physics
WAEC / WASSCE 2014
Equilibrium of Forces, Moments & Flotation
Solution
Alcohol of mass 21g and density 0.7g cm-3 is mixed with 10g of water. Determine the density of the mixture [density of water = 1.0gcm-3]
A
0.775gcm-3
B
0.875gcm-3
C
0.780gcm-3
D
0.880gcm-3
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
\(V_A = \frac{M}{D} = \frac{21}{0.7} = 30cm^3\)
\(V_w = \frac{M}{D} = \frac{10}{1} = 10cm^3\)
Vmixture = 30 + 10 = 40cm3
Mmixture = 21 + 10 = 31g
Dmixture = \(\frac{m}{v} = \frac{31}{40} = 0.775\)
Source: Myschool Past Questions Archive (Record #35748)