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Physics
WAEC / WASSCE 2005
Equilibrium of Forces, Moments & Flotation
Which of the following type of motion does a body undergo when acted upon by a couple?V
A
vibrational
B
translational
C
rotational
D
random
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 #34439)
Physics
WAEC / WASSCE 2005
Linear Motion, Projectiles & Kinematics
Solution
A body starts from rest and accelerates uniformly at 5ms^-2 until it attains a velocity of 25ms-1. Calculate the time taken to attain this velocity
A
2.5s
B
5.0s
C
10.0s
D
125.0s
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
V = u + at = 25 = 0 + 5t
t = 5s
Source: Myschool Past Questions Archive (Record #34443)
Physics
WAEC / WASSCE 2005
Current Electricity & Electric Circuits
The frequency of a swinging pendulum is the
A
number of complete oscillations the pendulum makes in a second
B
number of amplitudes the bob makes in a second
C
angle the bob swings through in a second
D
distance the bob covers in a second
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 #34454)
Physics
WAEC / WASSCE 2005
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
Which of the following about an object performing simple harmonic motion is correct? Its acceleration
A
is maximum at the extreme ends
B
is constant and directed towards a fixed point
C
is zero when it is displayed from the equilibrum position
D
varies linearly with the displacement from a fixed point and is directed towards the fixed point
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
In SHM, acceleration a = -\(\omega^2\) x , so it varies linearly with displacement from the equilibrium point and is directed towards it.
Source: Myschool Past Questions Archive (Record #34455)
Physics
WAEC / WASSCE 2005
Current Electricity & Electric Circuits
Solution
A body of mass 5kg moving with a velocity of 10ms-1 collides with a stationary body of mass 6kg. If the two bodies stick together and move in the same direction after their collision, calculate their common velocity
A
4.55ms-1
B
12.00ms-1
C
30.00ms-1
D
50.00ms-1
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
\(M_1V_1 + M_2U_2 = V(M_1 + M_2)\)
5 x 10 + 6 x 0 = V(5 + 6)
V = \(\frac{50}{11} = 4.55\)m/s
Source: Myschool Past Questions Archive (Record #34456)
Physics
WAEC / WASSCE 2005
Current Electricity & Electric Circuits
Solution
Fuel was consumed at a steady rate of 5.0 x 10-2kg per second in a rocket engine and ejected as a gas with a speed of 4 x 103ms-1. Determine the thrust on the rocket
A
20N
B
80N
C
200N
D
800N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = ma = \(\frac{mv}{t} = \frac{5 \times 10^{-2} \times 4 \times 10^{3}}{1}\)
= 200N
Source: Myschool Past Questions Archive (Record #34457)
Physics
WAEC / WASSCE 2005
Current Electricity & Electric Circuits
Which of the following quantities has the same unit as energy?
A
power
B
work
C
force
D
momentum
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 #34458)
Physics
WAEC / WASSCE 2005
Current Electricity & Electric Circuits
Which of the following source of energy is renewable?
A
sun
B
petroleum
C
coal
D
uranium
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 #34459)
Physics
WAEC / WASSCE 2005
Temperature, Thermometry & Thermal Expansion
Solution
The lower and upper fixed point of a thermometer are 30mm and 180mm respectively. Calculate the temperature in degrees Celsius when the thermometer reads 45mm
A
10.0oC
B
15.0oC
C
20.0oC
D
30.0oC
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
100....180
A......45
0......30
\(\frac{45 - 30}{180 - 30} = \frac{A - 0}{100 - 0}\)
A = \(\frac{15 \times 100}{150} = 10^oC\)
Source: Myschool Past Questions Archive (Record #34460)
Physics
WAEC / WASSCE 2005
Calorimetry, Latent Heat & Change of State
Solution
A body of mass m, has a specific heat capacity s, and a heat capacity c. If the temperature of the body changes by \(\theta^oC\), Which of the following equation is correct?
A
ms\(\theta\) = mv-1
B
ms = C
C
ms = s\(\theta\)
D
ms = c\(\theta\)
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Q = ms\(\theta\) = c \(\theta\)
ms = C
Source: Myschool Past Questions Archive (Record #34461)
Physics
WAEC / WASSCE 2005
Calorimetry, Latent Heat & Change of State
Solution
An immersion heater rated 400W, 220V is used to heat a liquid of mass 0.5kg. If the temperature of the liquid increases uniformly at the rate of 2.5oC per second, calculate the specific heat capacity of the liquid. [Assume no heat is lost]
A
1100Jkg-1K-1
B
320Jkg-1K-1
C
200Jkg-1K-1
D
176Jkg-1K-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
pt = mc\(\theta\)
C = \(\frac{pt}{m \theta}\)
= \(\frac{400 \times 1}{0.5 \times 2.5}\)
= 320Jkg-1K-1
Source: Myschool Past Questions Archive (Record #34467)
Physics
WAEC / WASSCE 2005
Calorimetry, Latent Heat & Change of State
Solution
Water falls through a height of 50m. Determine the temperature rise at the bottom of the fall. [Neglect energy losses. Specific heat capacity of water = 4200Jkg-1 K-1, g = 10ms2]
A
0.119oC
B
0.840oC
C
1.190oC
D
8.400oC
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
mgh = mc\(\theta\)
\(\theta = \frac{gh}{c} = \frac{10 \times 50}{4200}\)
= 0.119oC
Source: Myschool Past Questions Archive (Record #34473)
Physics
WAEC / WASSCE 2005
Calorimetry, Latent Heat & Change of State
The energy required to change a solid to liquid at constant temperature is called
A
thermal capacity
B
has lower specific heat capacity
C
latent heat of fusion
D
latent heat of vaporisation
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 #34478)
Physics
WAEC / WASSCE 2005
Calorimetry, Latent Heat & Change of State
Which of the following statements about boiling and evaporation at atmospheric pressure is correct?
A
evaporation and boiling of water take place at 100o
B
evaporation of water takes place at a temperature greater than 100oC, while boiling takes place at 100oC
C
evaporation of water takes place at 100oC while boiling takes place at a higher temperature
D
boiling takes place at 100o while evaporation my take place at temperatures lower than 100oC
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #34480)
Physics
WAEC / WASSCE 2005
Temperature, Thermometry & Thermal Expansion
Which of the following statements is correct?
A
the density of a liquid decreases when it expands
B
the density of a liquid increases when the liquids are heated
C
the real expansivity of a liquid is less than its apparent expansivity
D
a liquid changes to solid when heated to a sufficiently high temperature
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 #34482)